In this answer, I was told,
Many Mahayana schools of Buddhism, including at least some Zen sects and some Tibetan Vajrayana lineages, understand the supernatural as skillful means (upaya), i.e. useful metaphors/simplifications pointing to aspects of "reality".
Assuming this to be true, can these schools of thought discard the supernatural aspects (which we may refer to as "myths of Buddhism"), as such metaphors may be less useful or not useful in the modern age? In other words, may we "modernize" Buddhism as an upaya?
If the supernatural elements or "myths" (such as Buddhist cosmology etc.) are skillful means rather than integral to The Buddha's teachings, then is it correct to say that "modernizing" the teachings could also be an Upaya?
Has any recent guru (within the past 50 years or so) mentioned such a possibility of "modernizing Buddhism" in his writings or his speeches? Kindly give references.