My first impression is that it looks good. Lots of useful features. But I can imagine that if I had sent it to a bunch of other people who have no interest in KDE they would have closed the page again.
That said I have a question:
It seems that Plasma has tiling WM features. How useful are they?
One thing about tiling WM is that typical it's only part of a package. Another part is that people are typically looking at a lightweight hotkey driven workflow and the ability to script where and how windows appear with occasional non tiling things to fit applications that don't work well for tiling systems.
The other question I have is that one of the reasons why I go for these "lightweight" setups. Althouh xfce-settings daemons + tiling wm is what I do is also because of power usage. How is KDE in terms of power usage?
And yes, I realize that firefox, blink based browser, slack are the biggest power drains.