can any #gnome #gtk people out there tell me what the current state of https://gitlab.gnome.org/jpu/cambalache is?

more specifically, is this the main GUI designer tool that people are using atm? i understood it was the new generation of #glade since a while now

im happy to take another run at gnome desktop apps but i ideally like to keep the design separate from the code (also for collaborating with designers)