GNOME being slow and not having basic features like thumbnails in the file picker after almost 18 years was often attributed, by their maintainers, to be caused by GTK3 limitations. Even now Glade still needs a lot of "volunteering" to be production ready for GTK3. I don't use GTK anymore, this is my opinion after reading a lot about it and seeing recommendations like "if you need documentation just read existing code", "why is Glade missing X or Y? just copy some XML node, just edit the XML and pray".
Anyway who cares, maybe GTK4 is good and new GTK threads will not be full of people talking about how bad it was. But why not move the tools together with the rest? I know, it's open source, lack of maintainers, but I wouldn't dare to declare my toolkit stable until basic tools work. Qt is also guilty of doing that in some ways but at least the previous version is still production ready and they move really fast.
I don't know I'll ever get over my irrational anger about how they handle(d) GTK.
Anyway who cares, maybe GTK4 is good and new GTK threads will not be full of people talking about how bad it was. But why not move the tools together with the rest? I know, it's open source, lack of maintainers, but I wouldn't dare to declare my toolkit stable until basic tools work. Qt is also guilty of doing that in some ways but at least the previous version is still production ready and they move really fast.
I don't know I'll ever get over my irrational anger about how they handle(d) GTK.