People are just not aware of that.
The problem is the deployment of alpha software, we have no volunteers to even make good screenshots (the article shows GIMP on one of them!). Don't expect developers to work more than 24h a day
Again, there is single codebase in most KDE apps (minus examples like Konsole), no "hard porting" is needed except work on dependencies that are non-Qt, e.g. less portable filter dependencies for Krita.