I have two, KDE on my laptop that runs Arch (btw) which is my tinkering machine, and GNOME/Pop!_OS on the desktop, which is the one other people use and I’m not allowed to break lol.
Although I might switch the desktop to COSMIC at some point if it doesn’t cause too much trouble.
I kind of did this once! Essentially I got laid of from a job but happened to have a good money buffer and life was quite inexpensive at the time, so I just thought “fuck it” and went as long as I could without working, I made it about a year.
It was awesome! My mental health has never been better, I wrote most of a book, got pretty decent at Blender, started working on learning to make games… and then I had to go back to work and it all went to shit lol, that was several years ago and I haven’t touched any of it since.