I have been using GrapheneOS en my pixel for almost a year and quite satisfied.
The docs for compilation are neat so I'm running my own build with my own signatures and my own repository of their AppStore for my third party apps that I also build from source.
I run only those apps on the main profile and then keep a private space (set to autokill on lock) for proprietary apps that require Play Services.
Oh but they can, we are suffering this in Spain every weekend the football league plays.
Tons of Cloudflare IPs sent to a blackhole regardless of how many other non relevant websites are behind.