I'm still on 16.04 with Unity. I switch between Unity and Xfce (mainly because the machine is old). I hope community support stays strong and addresses some shortcomings that have been around (I don't recall what they were, but there were some even in Ubuntu 16.04). I'm not a fan of the other interfaces being similar to Windows, and I like having a better experience right out-of-the-box.

If there were a way to donate money to directly help continue Unity development and maintenance, I'd seriously consider it.