Hard to say, as a power user I of course enjoy having all the great tooling below the surface, like a proper shell and the ability to easily run all kinds of se

Hard to say, as a power user I of course enjoy having all the great tooling below the surface, like a proper shell and the ability to easily run all kinds of services like databases. Having a package manager like apt is also great, as most software can be installed/uninstalled/upgraded with a single command. Regarding the UI: The KDE UI is just very discreet and doesn't get in the way, and there are a ton of small productivity features that are really handy (multiple workspaces, mouse and keyboard gestures, widgets, highly configurable panels, different themes etc.). Windows feels quite limited and slow in comparison (I also run it on the laptop for things like gaming and Powerpoint), sometimes e.g. the explorer will take several seconds to open and the UI can be sluggish without reason. I think Windows 10 was really innovative and great when it came out, it didn't improve much since then IMHO. On the other hand, Linux WMs like KDE or Gnome constantly evolve and get better since they are not governed by a central authority that needs to worry about commercial interests.