But the main "problem" (if you want to consider it so) with Android is that it's a FOSS platform. Apple and Microsoft heavily strangle their respective closed platforms so that OEMs and carriers can't do anything to interfere with Apple's and Microsoft's business (aside from, in the case of Windows, pre-installing bloatware). But since anybody can legally install Android on anything, Google can't use the same kind of leverage. Well, that's a good thing, I say. It means I'm not on Google's leash.
Ubuntu is also a FOSS platform, and it has no problem updating without the PC manufacturer consent.