[dunefox]

These things are just the editor plugin executing the code in a background REPL and showing the output inside the editor, no? While for example real-time updates are pretty cool, I don't see how that makes it not REPL driven development. Nothing is stopping you from having this in Common Lisp (and I'm kind of sure CL already has this in emacs).

Also, this doesn't really allow for everything else Lisp has that go well with the REPL: conditions and restarts, interactive inspection of values and stack frames, etc.