Linux needs variety and new ideas to evolve faster and gain an upper hand over other operating systems, otherwise it will end up behind even Windows in terms of "new", most users want eye candy and extra functionality, they want modern look and design and usability that makes Linux superior to other operating systems, not only technically but visually too. Which is why I like what Canonical is trying to do, good things will come out of it for all, one way or the other, Wayland is the best example, Canonical's development of Mir greatly increased the speed of Wayland development. Even if Mir fails it will still be the factor that brought Wayland to Linux users faster. Competition is good for all.
Gnome is a good example of how initial hate for it (I mean Gnome 3) turned into a mostly positive attitude after they included community suggestions and new ideas in the design of future versions, 3.12 looks quite promising. New and radical turns arent that bad as long as developers listen to community feedback and implement what was lacking in the initial design. Unity went through similar phases, initially disliked or hated by many, it evolved in a quite usable desktop for most people, I find dash to be extremely useful to search for my local content, everything is at my fingertips in a few seconds and the UI is great once one gets used to it. Of course some people do not like it and they are free to do so.
But I digress, my point was that new ideas, even radical ones like Mir are vital in keeping Linux fresh and modern, competition makes developers think harder and come up with new solutions and design. Thinking in camp terms, us against them is never good because Linux development is intertwined and all benefit directly or indirectly when someone makes something good. I remember how people argued in the past about which desktop environment is better, Gnome or KDE, or rpm vs deb, or Debian vs Suse and the like.
And yes engaging with Dee is a waste of time, he proved that in his reply to me and others, I will no longer reply to his posts.