Beautiful in its intentions, but as far as mobile goes, pretty impossible building it from scratch.
Hardware fragmentation and lack of opensourceness make it impossible to build on top of proprietary hardware for mass adoption.
I see a future where some android/java dev forks GrapheneOS, strips it from all normal apps (except for system apps) and replace it with a privacy focused browser and we go with PWA for all the services and apps we normally would use.
A lot of works would come from nostr-based projects devs, accessible via PWA.
This is the future I envision.
Also, fuck you Apple ✌️