It works like a charm. I can have a REPL and my code right in front of me, I can cmd-down to go to a function definition, and it's overall a very pleasant developer experience.
Now, I did experiment with Emacs, so I do understand what you're talking about -- kill-ring-save and the related key bindings made zero sense to me, and I was having trouble doing things I'd do easily in IntelliJ.
You are misinformed. I'm using a GNU Emacs (-> Aquamacs) on the Mac and cut/paste/copy are invoked with the usual command keys. But usually I use the LispWorks editor, which is also in the Emacs family, and even there cut/copy/paste is the usual command sequence... Both editors are built with excellent Lisp support. One is written in C + Emacs Lisp and the other one in Common Lisp.
> mindblowingly archaic
You haven't even understood the old part, how would you be able to deal with the futuristic part?
"You haven't used a PDP-10, how would you be able to deal with a smartphone?"
It's such a shame because the development environment for Lisp could be so much better than other languages. It could be mindblowingly futuristic, instead of mindblowingly archaic.