Emacs was developed on the KTV in TECO on ITS, and the space cadet keyboard was only on the lisp machine. How did the latter affect vi, which ran on different

Emacs was developed on the KTV in TECO on ITS, and the space cadet keyboard was only on the lisp machine. How did the latter affect vi, which ran on different hardware and has a different model? Or Emacs, really? I wrote an awful lot of code using it but as I said it was unfortunately spongy.