The point about de-Google'd Android vs your insistence on GrapheneOS is that by the time you are using Google's libraries, like Maps, Play Services, or their notification service (Firebase, IIRC), you've already lost. GrapheneOS is not dramatically better than de-Google'd Android if you're still sending all your notifications through Google, as well as your location and things like contacts
The point is you have to leave Google with both for it to do much good
> insistence on GrapheneOS is that by the time you are using Google's libraries, like Maps, Play Services, or their notification service (Firebase, IIRC), you've already lost.
Graphene offers the option of sandboxing Google apps should you want them. The usual setup is a second user profile with all the Google stuff in it. My main profile only contain FOSS apps and nothing passes through Google's servers. I use the Google profile for the maps with a dedicated account maybe once a month when driving somewhere unfamiliar.