Hi,
I've been using krita and file layers for years (although I may be considered an occasional user) and only now did I discover that you can transform them by using transform masks.
I know it should be assumed that we read the docs and watch tutorials (and the feature is not that hidden anyway) but the thing is, once I see a message with a padlock saying "Layer type cannot use the transform tool", I just assume the feature hasn't been implemented so I don't even look further.

If instead the message said: "Use a transform mask for that", it would prevent what happened to me from happening to other users or at least save them some research time.

Thanks for that, I made a wish bug in the bug tracker, hopefully, it would picked by someone soon,

https://bugs.kde.org/show_bug.cgi?id=415656