A KDE dev mentioned on a podcast that issues related to Debian Stable get closed automatically on their bug tracker because fixes don't get backported :/
https://old.reddit.com/r/linux/comments/1pneqp4/kde_dev_do_n...
My wife was complaining about Windows issues so I ended up installing Fedora with KDE on her laptop. I would have preferred Debian but using Testing (as suggested by the dev) doesn't some ideal.
So it was with Windows Vista, Windows 7, even Windows 8. It's not an impossible ask for Windows either.
Adding keywords in the relevant .desktop files should be enough to make this work in other DE's too. I just tried it in KDE (by adding a 'comment=... (like notepad)' line in ~/.local/share/applications/org.kde.kwrite.desktop), it works as expected