Prescriptivism is inherently limited to situations where near-unanimous consent exists between all speakers.

Nah, prescriptivists love writing books saying that a thing almost everybody does - sometimes including themselves - is wrong. Prescriptivist amateurs with strong opinions sell reasonably well, publishers are quite fond.

But this is part of a project by academics and the academics abandoned prescriptivism because it's not science. We don't have prescriptivist chemists or physicists either.