Emacs is not that much different there with it's C-core and lisp-land. It had even a similar case with the reimplementation of linenumber-mode in C for performa

Emacs is not that much different there with it's C-core and lisp-land. It had even a similar case with the reimplementation of linenumber-mode in C for performance-reasons. The question is more what emacs can offer generally that vscode is lacking in ability, even just theoretically. Because in reality there are of course many features not implemented yet in vscode.