I don't think your complaints are a common experience.
I've used neovim for the last 10 years, but before that I used emacs with R for many years at work and it was great, certainly not slow.
Emacs is certainly capable of speedy editing; i don't mean to imply otherwise. But there isn't much explanation as to why emacs does things the way it does even if it makes the experience shittier.
Emacs is certainly capable of speedy editing; i don't mean to imply otherwise. But there isn't much explanation as to why emacs does things the way it does even if it makes the experience shittier.