KDE documents the XDG specification and seems to encourage using it, which is what I expected: https://userbase.kde.org/KDE_System_Adm ... _Hierarchy

There have also been previous threads about his topic:
https://www.reddit.com/r/kde/comments/9 ... y_support/
viewtopic.php?f=289&t=143296

Still, there is a .kde folder, which contains a few things that could all easily fit into the XDG system: https://userbase.kde.org/KDE_System_Adm ... ctory_Tree
share/apps -> XDG_DATA_HOME
share/config -> XDG_CONFIG_HOME
socket, tmp and cache are already symlinks to appropriate location

So why not use the proper structure instead of cluttering my home folder with yet another folder?

My expectation is that it's only still around for apps which haven't been updated to the XDG standard (as in they haven't even been updated to kde frameworks 5 yet).

I'm not entirely what the best route would be to clean this up, but perhaps start by filing a case to bugs.kde.org? or phabricator.kde.org?