I suggest seeing how you get on with the PixelUI for a bit
That's been my plan all along ...
Just stick with GoogleOS, i have 8A and it rocks. Android 16 otw and already have the April security update ( Always on the 5th of each month )
7 years of updates, i will never change to any custom ROM. Banking apps can give you alot of trouble then.
I really like it, especially coming from a very old, very cheap Samsung, with their UI plastered on top of Google, on top of Android. I plan on giving Google OS a good, long, leisurely look. My phone needs are very simple. Very few needed apps, no banking or other important stuff done via phone. Mostly calling, texts, and a few other tasks. I like the Pixel since it doesn't force as much app bloat as Samsung, but there are still a lot of Google distractions that I've either yet to tame, or not able to disable. So we'll see. I'm in absolutely no rush.
That being said, I'm me a good candidate for Graphene, based on all the reading I've done. Installation with their web installer is nothing like the old days of side-loading ROMs, and all the hassles that entailed. I've still to get more info on the "what if" situation arises, and I want to revert to the stock OS. Graphene would give me even better battery life than I get with the 9a's bigger battery, plus the 7 years of updates that follow what Google provides. And the idea of a secure, pure stock Android OS, with no distractions, is very appealing ...
... so only time will tell, my friend.

