Man.... I'm doing to switch to Linux full time soon. I really love the Windows 10 desktop interface. (Don't judge me) It's flat. It's fast. It's intuitive. It's got good ergonomics.
KDE allows me to reproduce that to a certain point using third party extensions. However, KDE plasma has way, way too many configurable options. And I've had my whole interface break just by changing the themes to the ones provided by default. There's too much stuff to configure. It breaks easily too and trying to come back often means nuking your whole home directory and start over. And when you go use someone else's PC, you're almost certain they've modified their desktop to a point you can't even recognize anything.
Gnome is simple to a fault. What you see is what you get. The user is limited to what they can configure but your environment stays the same and you get the same experience from one PC to another. You know what to expect. And it just fucking works.
This is what Linux needs. One single user experience for all. It needs a champion to sell it to normal less tech savvy people. As much I love KDE and QT, Gnome is the way to go.