It's not unity we dislike in particular (though, I never was a fan): it's Mir.
> The whole Mir hate-fest boggled my mind...It became a political topic as irrational as climate change or gun control
I don't even use Mir, but I hate it. I can see how that sounds irrational or political, but my opinion is based on my perspective of reality. Ideally, Mir and Wayland can be developed in tandem, but this clearly hasn't been an effective approach.
The fact is that we really don't need more than one display server, and from what I can tell, we shouldn't even try.
Working on Mir and Wayland means double the work to integrate each video driver. Until every video card has a performant and stable open driver, some of us have to rely on a manufacturer to give us one that works with whatever display server we intend to use, so those people can't rely on Mir or Wayland developers to get their preferred display server working.
Even if that were not an issue (looking at you, NVIDIA), it will be very helpful to have Canonical support Wayland. Neither project is really ready yet, and one of them just needs to be usable already. When hair news was asked what feature Ubuntu should work on, the top answer was DPI scaling. Replacing Xorg is the best way to accomplish that.
TL;DR: I'm excited to see what happens with Wayland in the coming months. We need it. Mir was just a distraction.