Oh I feel you. Typing too much too fast is terrible on the wrists.

I remapped some keys for the key combos and have no issues with those now. Regardless of editor, good posture may help. I find good posture easier with split keyboards which often include a thumb cluster.

Perhaps multi-modal editing is better and you can do that with evil-mode. I’ve created some prefix key combinations with Alt-Gr and with the super (windows) keys to create something like it whilst keeping most most common commands close to the default. Namely C-x is now s-c which is way more relaxing on Dvorak layout.

Doom Emacs includes evil-mode by default perhaps that’s your cup of tea.

That would be Emacs.

Emacs is like an operating system bringing various tools into the same editing interface, including email. Emacs is very adaptive, you can get VIm like bindings through evil-mode.