[solardev]

AMP was a somewhat popular experiment back in 2015-2010 or so, when it first launched, but it didn't last. From 2021 onwards it gradually declined and I'd consider it pretty much deprecated by now: https://en.wikipedia.org/wiki/Accelerated_Mobile_Pages#Decli...

The AMP email stuff was just a side add-on to the main AMP web pages effort, but when that web stuff died, the email stuff didn't have much of a chance to stand on its own.

It's too proprietary and too niche, Google's failed attempt to reinvent web pages and emails for their own benefit.