You say you're not limited to one and only desktop environment as if that is a good thing. You must have loved it when Bluray and HD-DVD were getting exclusive movies so you had to buy two players, so much choice. Its a pity that everyone grew up and spoiled it for you.
I don't care about that tbh, I have neither of them. What I do know though is, that if one system survives and the other one is killed, it is not neccessarily the best one which stays. VHS and Betamax is a common example, maybe the Amiga aswell. SO, having the freedom of choice is a good thing indeed. Just pick whatever suits your needs best.