My view is that this is only an individual symptom of a larger scale problem. It seems that there are a lot of old, verified, almost showstopper bugs that just get ignored. I'm too busy/lazy to hunt the links at this point, but for example GNOME3 has probably from the beginning had a bug that it gets very sluggish after a few days, at least on some GPU's/drivers, the kernel's trashing behavior in out-of-memory situations is horrible, the audio stack is a horrible mess etc.
It's probably a wider problem of QA, that may be very difficult to solve. At least as a programmer I'm first to admit that I don't want to use my spare time fixing bugs. Debian's almost draconian policies seem to do quite well in terms of stability, but the desktop often lags behind (this may be unavoidable) and the desktop doesn't seem to be a very high priority for them.
PS. This post in no way suggests that things are better, or aren't a lot worse, in Windows-world and OS X with the controlled hardware platform is a very different situation. Maybe I should check if the grass is really greener in the BSD-side.