If there were a way to donate money to directly help continue Unity development and maintenance, I'd seriously consider it.
GNOME Shell is pretty good, and hopefully it can get even better with contributions from Canonical and the larger Ubuntu community.
Granted, this only happens under Wayland, but I have a hidpi display on my laptop and Xorg doesn't support a different dpi for external monitors. So I'd much prefer to be able to use Wayland.
Unity was made to unify people's experience with using it on a tablet, phone or desktop. It is pretty clear that the only thing left is desktop. I don't see what is unique that would compel a developer to continue another project when they create their own or join one of the bigger projects with an already established community.
Personally I love KDE and i3. I never use anything else for years because I don't have a problem I am hoping to solve through another project. What does Unity offer for a person to switch?
If you like to customize and have lots of options = KDE
If you like things to have less options and "just works" = Gnome
If you lie _____ and ____ = Unity
I am looking for an active fork.
I also loved Unity and I’m very sad to see it go, but gnome 3 with a few extensions is a worthy replacement.