@ljrk @Migueldeicaza I have! And, honestly it looks pretty fantastic. I did the basic tutorials, went through the relm4 book. But I realized that since it's an abstraction on top of gtk-rs, I would be hamstrung using it unless I had some real gtk-rs experience under my belt.
If I were to make another app in rust & gtk, I'd probably go the relm4 route, but honestly, as mush as I love rust (and I really do), I think Swift is a better fit for user-facing gui application development.