Even at the time, most folks had forgotten or never knew about xeyes.
I did use to customize everything in the late 90s/early 2000s. I loved Sawmill/Sawfish for its lispy extensibility. I was constantly flipping between heavy desktop environments and seeing how stripped down I could run.
Nowadays I don't even change the wallpaper on my mac. I don't use any fancy shell prompt (just host$).
I do still have a ~200 line shell rc just to make all my oses consistent (macos, freebsd, redhat, debian/ubuntu) and deal with junk like my ssh-agent. I change a line or two every year or so. And my neovim config is in flux. But most everything else I use is just OOB.
I should say I did fall in love with chezmoi for managing config like this a couple years back and still use it religiously.