Competition of implementations is good but competition of standards less so. My biggest problems with Ubuntuland-alternatives is that they expect the world to pay the maintenance cost for their NIH syndrome. Mir as a Wayland compositor is fine. Mir as something that every toolkit needs to implement is a giant waste of everyone's time. The same is true for Snap - if you could make one package that works with flatpak and Canonical's implementation then I would be a lot less opposed. But you can't. Because Canonical doesn't care how much extra work everyone else has to do as long as they get their way. Thankfully, so far they don't in the end - I expect Snap to follow.