If 99% of software was cross platform they'd have to give people what they want instead of giving us what Microsoft wants
I find great that, differently to current trends in UI design, they're giving the users options. Everyone can choose whatever they like best.
Yeah, it may be confusing to some users that there're several options (although I guess that that kind of users will probably never even stumble upon the option to change the default), it does add a bit of extra code (but not much, since it's just a bit of UI code that ends up calling the same logic code) but I think it's positive overall.
This also touches me personally since I don't like some current trends in UI design (e.g. Win 10's mobile UI elements for every form factor, very limited theming, latest Gnome
If this is timesharing, give me my share right now.