True. I have installed PMOS on a Xiaomi Redmi Note 4 and it is has great support for the hardware.
Amazed to see Linux booting natively on a palm sized device with full hardware support and computer capabilities was out of the world!
Given the fact that the device is more than a decade old, it still runs the mainline 6.x Linux kernel and the UI is good! (desktop manager which I've installed it is based on POSH Shell).
Looks cool and since calls, SMS, Wi-Fi and data works fine to a good extent, the only gripe was that camera is unusable in it's current form. Have not tried the android subsystem yet I don't think it'll work due to device limitations.
Have installed Tailscale and primarily using it for remote SSH administration of all my devices through Tailscale. The device build is still solid (which I don't see in the newer devices! due to planned obsolescence) and browser based netbanking access works fine.
Caveats of a small device, keyboard and user experience matters though I'm not complaining because I can pretty much see what happens on the device and I'm not feeding any unwanted signals to anyone.
Constantly on the lookout for pure Linux based devices. Unfortunately, yet to my hands on Librem based device or on a Fairphone!
I hope the world moves towards a Linux based device (being a Linux user for close to 3+ decades (since the early Sco Unix times with core systems programming, I always dream of it! BTW, being a hardcore C programmer who has worked across almost all OSes and CPU architectures!) and such wish and dream will fully be fulfilled only on Linux or on *nix with firm belief!
Hope someone takes a serious move...