Do not get me wrong. I used to love custom ROMs since the days of android 1.6.
But if I pay 500€ and more for a phone I would not risk to unlock the bootloader. For my specific device (Samsung A52s) the camera app does not even open if I unlock the bootloader using the stock ROM.
Unfortunately it is not feasible for every day use. Camera, payments, netflix...
Yeah. I get it. It's good for old devices to be useful for years to come.
What about the battery though? Having a device with an old battery plugged in the socket 24/7 is a fire hazard.
I would love to use my old nexus 10 with this perfect screen today. There is still no way to use a mobile device without a battery plugged in...