If you are someone that mostly likes the Windows 7/10 experience, KDE out of the box is basically that. It's more customizable. It's (IMO) less clunky and less burdened by legacy components. But it really just feels like windows used to feel like.

But also just fast and low memory. You can run KDE on ancient hardware. If you have something like 512MB of ram, you can do KDE just fine.