I like #KDE, and I follow development of #Plasma, and I even signed up to pre-order the #Vivaldi. But my only experience using KDE was as part of #Knoppix, like *way* at the beginning of that project.
Every time I think of trying it out, something happens, like discovering #i3wm, or #Ubuntu defaulting to #GNOME (which has been my preference for years).
Alas, I may never get to those sweet widgets (unless someone revives the Vivaldi, because I am totally behind that!).