I think it was already GTK4
My bad. My statement then only applies to Libadwita, it was great for GNOME and it looks so good. This is not only in general asthetic (+ now there's accent colors) but also as someone who benefits from the accessible widgets and interfaces. I know people love Dolphin, but it's so much easier and cleaner for someone like me to use Nautilus, and Libadwita in general.