@icedquinn@blob.cat @dushman@den.raccoon.quest Qt never was truly open-source, they just throw tarballs under libre licences and ask every contributor to assign code to them so they're free to *not* do open-source releases like they're doing with Qt5 since Qt6 got released.
Meanwhile GTK changed from a reusable toolkit to a "Gnome apps" toolkit around 10 years ago.