> Now days most people don't even bother to change their wallpaper. Live a little!

There are some nice communities around custom desktops, like https://www.reddit.com/r/unixporn/top/?t=year (despite the odd name)

For other OSes there’s also https://www.reddit.com/r/desktops/top/?t=year

That said, for many the defaults are sufficient and I guess people just use what’s there out of the box to get things done.