Even though I don't have much use for it now that I'm out of school, Krita and the Calligra Office suite make up one of the reasons I've been a KDE user forever. The most prominent KDE apps have long done an amazing job, imo, of making tons of functionality accessible in a way that feels orderly and approachable rather than chaotic and cluttered.

Amarok was this way, which made it just incredible when the most common way to listen to music was local collections.

When Dolphin came out, it seemed like a harmonization of Konqueror's massive featureset along the same lines.

Some apps are a little bit messier (Kate, Konsole) but are still way more orderly and easy to explore than popular alternatives on Windows despite matching or beating them on features.

I feel like this aspect of KDE apps is often undersold. Outside of KDE, I hardly ever find anything as powerful as a mature KDE app whose UI isn't just an overwhelming hodgepodge of menus. Krita seems like a leader when it comes to this approach to adding features but in a thoughtful way.