Haven't the GTK developers basically admitted that GTK exists to serve the needs of GNOME, and if anyone else gets good use out of it, that's accidental and unsupported?

I really wish we had another popular GUI toolkit that isn't Qt.

Why do you need a toolkit different from Qt? Because of the C++ API? Because the licensing (LGPL now so should be good)? Not lean enough for you? Just want something run by the community and no beholden to a single corporate overlord?

I'd much rather have one single toolkit standard so that everything can look and behave the same TBH.