AMP is a nice idea. In it's current implementation it's flawed and very limiting. Hopefully it stays a plugin for a long time. To me, Google AMP is much like Gutenberg (at this time) in that both only make sense in the context of a blog.

I can see why Automattic has partnered on this though but I'm surprised that it took them this long. Promoting WordPress as a CMS (as well) isn't a high priority project / popular concept these days for Automattic and seems to often play 2nd fiddle to promoting it as a blogging platform, adding blogging features, etc.