grapheneos is everyday better, is incredible the attention to details. Even UX is perfect in my opionion, its not like many "custom android roms" were things seems to work unless they dont.
Grapheneos is really fantastic.
I'm a fan of "gran baazar" unix-like softwares, and I fear that android will abandon all us freedom lover users when we most need it.
Its a monolith, and when google will do his corporate bullshit move we will need "another google" (in terms of resources needed) to fork this giant mess.
So I always look at alternatives, like mainline-linux + desktop-toolchains phones, like the pinephone, but they are FAR away from being even decently usable everyday.
I enjoy grapheneos, and we will see what will happen. Theres nothing worse than "optimize fro the future".
Use grapheneos today, its foss, its fantastic, Its the best tool available for the job.