Kate is a lovely editor. I wrote about half of Designing Sound with Kate before switching to Emacs near the end (to better handle code integration). What I appreciate is the ability to have a pane of files open and very quickly cut and paste between them.

Even though I am a baptised and confirmed Emacs disciple, I still never find the buffer orientation quite maps to files the way I want. Kate hit that sweet-spot in a file based workflow,