>>kotaKa+(OP)
Anyone even remotely privacy or security conscious needs to vote with their wallet in protest and stop buying Android phones, otherwise it's only a matter of time 'til Google bans side-loading and it becomes impossible to buy a phone that can run any kind of anonymous or end-to-end encrypted communication software.
>>gigel8+Sv
GrapheneOS is a beautiful stop-gap, but there are real bona-fide Linux smartphones out there. To be clear, there are not many, the hardware often isn't great, the software often isn't great. PinePhone and Librem come to mind.
Android is decades ahead of that in security, functionality, utility, devex, and design. It's a fools errand to try and modernize that, over building on top of AOSP.