[BearOso]

Gnome shell doesn’t even use Gtk, or at least not for drawing and such. If it’s there, it’s completely abstracted away in their JavaScript layer. And yeah, most extensions broke from 3.38-40 already anyway.

[mixedCase]

I'm almost sure they do use it, through GJS. And those are the official JS bindings to Gtk.

And they definitely did break from 3.0 to 4.0 as I experienced by simply trying to get a sample application from the docs running, and failed to.

[locke78]

GNOME Shell doesn't use GTK at all. It uses a different internal toolkit called St.