I have to wonder how much of Reddit's traffic is bots and lurkers though.
Post quality is a bigger indicator, and that does seem to be dropping. This is why Reddit banning 3rd party apps was such a big deal. It doesn't matter if 99% of your users use the official app if 99% of the content posted to the side is posted by the 1% that don't.
As someone who was around for the digg migration, it didn't drop off overnight (hell digg.com is still around), but they gradually bled content until everyone was on Reddit. Lemmy right now is very reminiscent of early Reddit.
I like Gnome Shell. It's polished and extensible. Libadwaita and the header bars are nice as well. I generally prefer nautilus to dolphin, even if I hate having to ctrl-l to edit the path.
I use KDE however because Mutter is still dogshit slow, especially in wayland. My work PC has a R5 3600, RX 570, and 48GB ram and it struggles to maintain 60fps across 3 1080p monitors. KWin runs significantly better, so I use KDE and just configure it like I would Gnome.