that's the spirt and that's why nothing changed in the last 10 years. There are different communites with their projects and they try to make that work on some old or obscured HW and every time some company that actually can make a new HW comes out with something they alway do the same, instead of using something that basically works they start from scratch.
Fragmentation in mobile linux is far worse than it was ever on android. And it just goes on.