I took the plunge into GrapheneOS a week ago. I picked up a new Pixel10 Pro and never even tried the stock OS (except to unlock the boot loader).
I've got almost everything working the way I want. There were a few non-essential banking apps that won't install. The most annoying problem I had is when I tried to install Strava, which I cannot get working. The app installs, but it will not let me sign in. I guess I need a replacement, because I use that app a lot.
"Strava is an American internet service for tracking physical exercise which incorporates social networking features."
Sounds like spyware, to be honest.
I run Strava on my Pixel 10 Pro Fold running GrapheneOS. IIRC you need to have Google Play Store installed (with zero permissions, preferably) to make Strava work.
I know a friend is using Strava on his Pixel 10 running graphene so there should be a way
The most hilarious is McDonald's app - it refuses to work without Play Integrity check. I wonder what braindamaged reasoning is behind this. Do they want to position themselves as a bank or something?