Leaving aside the lock-in issues, AMP causes me minor annoyances more often than it helps. For instance, when I open a search result from a site like Reddit, I get a static logged-out view, instead of the normal one that obeys my preferences. And if I want to copy the link, it takes a few extra taps to get the original one.
I still don't understand why Reddit signed up, it's a terrible experience for their users. I commonly search 'reddit x' when I want an opinion and know there will be a sub Reddit, but now Reddit have made that use case incredibly bad by enabling AMP.
I'd imagine a notoriously cash-strapped site like Reddit is enthusiastic that Google is willing to offload traffic originating from Google Search on Mobile to Google's own AMP CDN. This helps incidental visitors still consume Reddit content, while real Reddit users interacting with real website or through a Reddit app are still getting the normal experience. This arrangement only really frays at edge cases, where a logged-in Reddit user uses an external search like Google to look something up.
