In reply to Otto.

The goal of AMP is that it should cease to be necessary. One of the key outcomes of the AMP project has been discovery of technologies developed as part of AMP can be submitted for standardization. Here's a great post on that: https://amphtml.wordpress.com/2018/03/08/standardizing-lessons-learned-from-amp/

As for “removing details that don’t fit” are you referring to stripping out markup that is not valid AMP? If so, this is the AMP plugin's doing, not the doing of the AMP project. The v1.0 of the plugin will give much greater control over whether something AMP-invalid is suitable for removal, or if the AMP version of a post should just not be made available at all.