Android has a proper security, IPC model, the whole userspace has a focus on battery-saving, apps are made in a way to be suspend-able, etc. “GNU/Linux” is living in the past where C-posix binary goes brr is considered safe and enough, and I just don’t think that’s the case.

Nope, even running android on the same pinephone hardware results in a smooth system - it’s almost like google has been spending dollar billions on fixing and developing stuff that won’t magically appear in a userspace stuck in unix times. The kernel did get some upstreaming, that’s why linux laptops are remotely portable.

But for a mobile device you need a used space that understand the resource-constrained environment and are good citizens. This makes a huge difference in an age where racing-to-suspend is the way to conserve battery.