This would have been great when I was learning Lisp in school! I tried emacs but due to joint issues the keybinds were painful to use, so I gave up and did the course in vim+SBCL's REPL instead.
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I personally switched to emacs for more than just Lisp when I started developing early signs for RSI. Switching to a purely KB driven interface has saved my wrists.
Keysets or chorded keyboards have been around since The Mother of all Demos, but never really seemed to have caught on. It makes sense to me to put them at your feet to chord some common actions or modifiers.