If you used VIM, there is no possibility VSCode would feel faster in any sense, I don't understand how it is possible. You can plug in the whole VSCode tooling inside VIM making it the same in terms of functionality, and it would not affect its startup time or input lag whatsoever - it will remain unnoticeable. It is possible to open infinite copies of vim recursively inside vim's own terminal, so even if I recursively stack up 32 vims with all my plug-ins loaded inside each other, they still don't show a hint of a lag