The modern version of Gtk and its APIs started with the switch to Cairo back in Gtk 2.8 circa 2005. While Gtk 3 and 4 have undoubtedly improved upon Gtk 2, they fundamentally still work in a similar paradigm and still have all the crust of a 20 year old library. Like most old software projects, it has some level of backwards compatibility and deprecates and adds slowly. Gtk is, like, the definition of legacy, and Qt is in a similar boat. They’re OLD old.
I would, but I can’t get through their captcha (even w/ adblockers, tracking, etc all disabled)