What always prevented me to actually switch to Emacs was how it's so huge it seems impossible to get an overview of how to do what. Every programming language-specific mode comes with its own unique features that surprise me when I just want to write code, meanwhile just entering a single tab without it getting deleted again is an odysee of reading documentation. At the same time it's slow and despite it having the best Vim emulation it cannot hide that Emacs just doesn't work like that. As soon as you leave the file's buffer you discover how Evil mode's illusion falls apart on all sides and you always land in situations where you have to use a mix of Vim and Emacs keybindings.

I love the concept behind Emacs, I just think at least 80% of its code should actually be in plugins, and the program itself and a lot of large expansions are really bogged down by the sheer size and lack of simplicity.

Oh, and Emacs-Lisp...it's much better than Vimscript, but it's a disappointment nonetheless. Loops instead of recursion in Lisp, really? And last time I tried it the parser could not handle unmatched brackets in comments.