There is absolutely no reason for sites such as the one linked here to have AMP enabled. It's a pox on the web and Google has enough power as it is. The sooner AMP dies the better. If you want your site to load faster get rid of the cruft.
I enabled it on https://www.gitignore.io a few months ago because it suggested that it would improve my mobile users experience. After posts like these, I think it's time to take it back down.
Only an anecdote, but AMP trashes my mobile experience. Using Chrome on Android (so it ought to be good...) it rewrites back-button functionality, so that even after I've changed through 5 different pages, a single 'back' press takes me all the way off the site to Google search results. It also eats a bunch of screen real estate with the AMP bar for longer than the normal address bar.
There is absolutely no reason for sites such as the one linked here to have AMP enabled. It's a pox on the web and Google has enough power as it is. The sooner AMP dies the better. If you want your site to load faster get rid of the cruft.