No it doesn't, because most hardware manufacturers have never been particularly good at making software anyway (and many still aren't, judging by their current apps and Android customisations). If anything it's better this way because you can jump from one manufacturer to the next and not lose apps, purchases or have to start learning an entirely new OS that will likely be obsolete by the time you next upgrade because nobody is buying into it.
There are plenty of other, smaller mobile systems out there, but nobody is really using them because everything is so app-centric now. They might have some neat features but if you can't use any of the popular apps on them, what's the point?
