Trust me, that is not Linux specific, Windows has that bullshit as well. Everything depends on how the devs wanted to solve the local settings problem, and if you have devs that work 1 or 2 years on the project and then quit, which in turn are replaced by other devs, you get this bullshit. The new ones usually don't wanna touch the old one's code, or if they do, they only make minor changes, just enough to make something that's not working, work.