I still mostly do, but the laptop I'm using right now has Windows 10 on it (for now), and I don't even mind.
Anyway, I wish I knew about your project back then. The Motif look is so much nicer. It doesn't have those garish strong colours all over the place. And the widgets are more familiar.
Modern desktops are still better than either option (you even basically say as much on Github) but your project was certainly solid, and an alternative that is so much easier on the eyes.