KDE SC is great in many, many ways, but I have found that some of those ways are anything but obvious.
Nothing specific to KDE, though, as it happens with all kinds of software and devices nowadays. Users want the quick route to do their thing, which most often results in them using a tiny portion of the application or device functionality...
After all, who reads a darn manual, right?
Having said so, I found that such "lazy" approach often makes me miss things that I do care about, pieces of functionality that I would love to use if I knew were there, and that is very much the case with KDE. Indeed, the K Desktop provides lots of power, sometimes more than I need myself, so I used to stick to the basics to get the job done. In doing so, I overlooked tons of great stuff I do use now, I simply didn't know better!