Does nirodha samapatti aka saññā-vedayita-nirodha refer to a super trance-like state beyond the 8th jhana in which the practitioner becomes completely unconscious without any mental activity (like what the commentary above suggests) with cessation of ALL perception and feeling?
I think the question can be framed like they did in the sutta.
Then Ven. Ananda went to the Blessed One and, on arrival, having bowed down to him, sat to one side. As he was sitting there, he said to the Blessed One, "Lord, could a monk have an attainment of concentration such that he would neither be percipient of earth with regard to earth, nor of water with regard to water, nor of fire... wind... the dimension of the infinitude of space... the dimension of the infinitude of consciousness... the dimension of nothingness... the dimension of neither perception nor non-perception... this world... nor of the next world with regard to the next world, and yet he would still be percipient?"
"Yes, Ananda, he could..."
"But how, lord, could a monk have an attainment of concentration such
that he would neither be percipient of earth with regard to earth...
nor of the next world with regard to the next world, and yet he would
still be percipient?"
"There is the case, Ananda, where the monk would be percipient in this
way: 'This is peace, this is exquisite — the resolution of all
fabrications; the relinquishment of all acquisitions; the ending of
craving; dispassion; cessation; Unbinding.' It's in this way that a
monk could have an attainment of concentration such that he would
neither be percipient of earth with regard to earth, nor of water with
regard to water, nor of fire... wind... the dimension of the
infinitude of space... the dimension of the infinitude of
consciousness... the dimension of nothingness... the dimension of
neither perception nor non-perception... this world... nor of the next
world with regard to the next world, and yet he would still be
percipient." - AN 10.6
I think this is analogical because cessation of perception & feeling is a very strictly defined term. Feeling is defined as the 6 classes of feeling; primarily as mind-base contact and classed as to associated with contact based on the 5 faculties or not.
Ananda tries to cover all states of feeling & perception starting with what is derived from earth, heat, wind and water such as plants or our own body with it's organs implicated in contact, this are all bodily and sensory feelings pertaining to the five faculties & the memory or imagination based on forms cognizable via the five faculties which are unimpaired for an Arahant;
then he talks about the arupajhana, of which there isn't much varition as these are trance like states or perception or neither perception nor non-perception;
Finally he says 'neither this world nor the next', which in the discipline of the noble one's would mean neither this mind & body nor the next because in the discipline of noble one's that in the world which conceives & perceives the world is called a world (mind, eye, tongue, nose, ear, body).
I think this means neither something pertaining to this life or some vision of the next life.
Imo, essentially like Ruben, Ananda seems to be asking about whether there is some super trance-like state beyond the 8th jhana in which the practitioner becomes completely unconscious without any mental activity with cessation of ALL perception and feeling.
Sariputta puts it like this;
“Once, friend Ānanda, when I was staying right here near Sāvatthī in the Grove of the Blind, I reached concentration in such a way that I
was neither percipient of earth with regard to earth…nor of the next
world with regard to the next world, and yet I was still percipient.”
“But what, friend Sāriputta, were you percipient of at that time?”
“‘The cessation of becoming—unbinding—the cessation of
becoming—unbinding’: One perception arose in me, friend Ānanda, as
another perception ceased. Just as in a blazing woodchip fire, one
flame arises as another flame ceases, even so, ‘The cessation of
becoming—unbinding—the cessation of becoming—unbinding’: One
perception arose in me as another one ceased. I was percipient at that
time of ‘The cessation of becoming—unbinding.’
I this is is a bad translation tho, i think the end should be 'The cessation of existence is Nibbana'
Bhavanirodho nibbānaṁ bhavanirodho nibbānan’ti kho me, āvuso, aññāva saññā uppajjati aññāva saññā nirujjhati.
There is also a mention of super trance-like state beyond the 8th jhana here;
"He is absorbed dependent neither on earth, liquid, fire, wind, the sphere of the infinitude of space, the sphere of the infinitude of consciousness, the sphere of nothingness, the sphere of neither perception nor non-perception, this world, the next world, nor on whatever is seen, heard, sensed, cognized, attained, sought after, or pondered by the intellect — and yet he is absorbed. And to this excellent thoroughbred of a man, absorbed in this way, the gods, together with Indra, the Brahmas, & Pajapati, pay homage even from afar:
'Homage to you, O thoroughbred man. Homage to you, O superlative man —
you of whom we don't know even what it is dependent on which you're
absorbed.'https://www.accesstoinsight.org/tipitaka/an/an11/an11.010.than.html
I think therefore one can say that there is a state where one is perceptient of unbinding and it is a suspension physical & mental activity and one is said to be percipient thus ‘The cessation of existence is extinguishment.’ One's life force is not exhausted and faculties are exceptionally clear, obviously as one is seeing with wisdom the truth of cessation as it actually is at that time and will thus abide percipient of unalloyed pleasure for a time determined by prior development and for up to 7 days.
This is said similarly to how one would say in regards to the attainment of the formless dimension of the perception nothingness at that time i was percipient 'There is nothing'.
"There are three conditions for the persistence of the theme-less awareness-release: lack of attention to all themes, attention to the theme-less property, and a prior act of will. These are the three conditions for the persistence of the theme-less awareness-release."
"And what is the nothingness awareness-release? There is the case where a monk, with the complete transcending of the dimension of the infinitude of consciousness, [perceiving,] 'There is nothing,' enters & remains in the dimension of nothingness. This is called the nothingness awareness-release.
"And what is the emptiness awareness-release? There is the case where a monk, having gone into the wilderness, to the root of a tree, or into an empty dwelling, considers this: 'This is empty of self or of anything pertaining to self.'[5] This is called the emptiness awareness-release.
"And what is the theme-less awareness-release? There is the case where a monk, through not attending to all themes, enters & remains in the theme-less concentration of awareness.[6] This is called the theme-less awareness-release.
"This is the way of explaining by which these qualities are different
in meaning & different in name.
"And what is the way of explaining whereby these qualities are one in
meaning and different only in name?
"Passion, friend, is a making of limits. Aversion is a making of
limits. Delusion is a making of limits. In a monk whose fermentations
are ended, these have been abandoned, their root destroyed, made like
a palmyra stump, deprived of the conditions of development, not
destined for future arising. Now, to the extent that there is
immeasurable awareness-release, the unprovoked awareness-release is
declared the foremost. And this unprovoked awareness-release is empty
of passion, empty of aversion, empty of delusion.
"Passion is a something. Aversion is a something. Delusion is a
something. In a monk whose fermentations are ended, these have been
abandoned, their root destroyed, made like a palmyra stump, deprived
of the conditions of development, not destined for future arising.
Now, to the extent that there is nothingness awareness-release, the
unprovoked awareness-release is declared the foremost. And this
unprovoked awareness-release is empty of passion, empty of aversion,
empty of delusion.
"Passion is a making of themes. Aversion is a making of themes.
Delusion is a making of themes. In a monk whose fermentations are
ended, these have been abandoned, their root destroyed, made like a
palmyra stump, deprived of the conditions of development, not destined
for future arising. Now, to the extent that there is theme-less
awareness-release, the unprovoked awareness-release is declared the
foremost. And this unprovoked awareness-release is empty of passion,
empty of aversion, empty of delusion.
"This, friend, is the way of explaining whereby these qualities are
one in meaning and different only in name.
https://www.accesstoinsight.org/tipitaka/mn/mn.043.than.html