Here and there patches like that make it in. Sometimes getting them fully flushed out so that they do what they're supposed to do without introducing a bug can be a long process, and sometimes the devs are cooking up something that will address whatever a particular patch does in a different way. I remember hearing something about view ports or something or another which will make scrolling-margins not needed. That and they usually have bigger fish to fry than some of these features, though many of them are useful and valid things, just not as important as playback, etc..