>it seemed like a bit of a fraud (on Google's part) because it was fundamentally gimped.
AOSP is designed to be customized by vendors before they ship a device with it. Development of AOSP goes towards the shared OS pieces that actually get used and not towards things which would just get swapped out. Which is why the stock user space has not had much investment.
I assume that is the same situation on raw AOSP.
I’ve came across this in app when accessing some secure flows, like adding credit card numbers.
However, I personally switched to CalyxOS. I was a bit unhappy with LineageOS pushing users towards the Gapps, by blocking microG from working properly (they blocked signature spoofing, a problem during the pandemic) and by forbidding discussions about microG on their subreddit, together with forbidding to even talk about issues with VoLTE or anything that touches rooting the system. They course corrected only a little bit with the signature spoofing, but still project user hostility otherwise via those rules. CalyxOS gave me a more usable system out of the box, while having a bigger focus on security (locking the boot loader) and presenting the project nicer. Vastly less devices supported though, and if pixels go closed now the Calyx project would have to implement big changes, those were their main devices.
As we all know, it has done nothing of the sort.