I am aware of that, but the fact is that this is less convenient than a standard "cut", as on other systems, so I honestly never use that. What I do instead is I have two windows open, and then I drag and drop between them. Also less convenient, but better than having to keep an extra hand on the keyboard constantly.

And of course, a "always on top" flag would have been really nice for dragging and dropping between windows. That option is really nice in KDE, but missing on both Mac and Windows.