Updated app switcher (super+tab) designs
GNOME's app switcher hasn't changed for a long time, and it's been a long time since we properly reviewed the design.
Back when we did the user testing for GNOME 40, we did get some negative feedback about the app switcher, particularly the behaviour when there are multiple windows per app. People didn't seem to like the delay before the thumbnails are shown, and the arrow to indicate multiple windows wasn't very obvious.