Honestly, they had jumped the shark back in GNOME 2 era, when the giant rewrite started being used as excuse to not bring back functionality from 1.x series.

My Canary in the coal mine was, IIRC, discussion about presenting certain printer options to end user around 2.2 to 2.4 switch, and some options getting discarded from GUI and into regedit-style tinkering, because GNOME team considered them superfluous. From what I recall, the options were ones that I would occasionally use on Windows (and not just I, but also people who wouldn't be considered techies).