> I'm sure the enthusiasm is appreciated but Graphene is very different even from stock Android.

I'm daily driving a Pixel 9a with GrapheneOS and I strongly disagree, at least from an ordinary usage perspective. Yes, you can make it very different (by not installing Google Play), but with the sandboxed Google Play it's exceedingly rare for me to notice any differences; it feels very close to any other stock-ish Android. The only big differences were RCS chats failing w/ T-Mobile (but that's been fixed) and some apps being mean about Play Integrity or whatever (but that's gonna be true of any custom ROM, even if it's entirely unmodified from AOSP).