lunarman "Does anyone here use grapheneOS as a way to simplify life digitally without committing to using an actual dumbphone?", not me, but the phone only, by default, comes with very bare essentials
PDF viewer, attention app, app updater, camera, gallery, photo editor, SMS, dialer, file explorer, contacts, clock, calculator, and a web browser
That's pretty good compared to stock OSes that install Candy Crush and Facebook by default on your phone.
You could easily have this scenario by just not installing anything else