[hsbauauvhabzb]

Thanks for your input.

I’m under the impression emacs performance will improve but agree it’s an issue, particularly on very long lines - my understanding is that any modes must recalculate things (font colors, etc) on every change and recalculate major parts of the file. Iirc emacs 30 implements treesitter and a few other things which should improve performance, but some issues still undoubtedly remain.