Just want to say, I switched to KDE (Plasma 5) on Debian testing a month ago, after running Windows 7/10 for the last 10 years. I'm very happy with it. If nothing else, it's so nice to have a desktop UI that's cohesive. I feel like everything is designed to be used by a mouse and not touch, which is OK because it's a desktop. It's also surprisingly refreshing to have scrollbars and buttons be styled the same everywhere.