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I'll concur that it looks really good, but it's also pretty buggy. (fully updated KDE Mint)

Report them upstream if you have the time. I'm looking to give all popular DEs a chance in an Arch Linux VM pretty soon.

Ever since moving to just a window manager (awesomeWM to i3wm) I've not felt the need for a full-fledged desktop environment.

For KDE you might want to go with KDE Neon