If you are like me (same vim, python, no LLM, no autocompletion, no syntax highlighting noise), LSP will make you a better developer: it makes navigating the codebase MUCH easier, including stdlib and 3rd party dependencies.
As a result, you don't lose flow and end up reading considerably more code than you would have otherwise.
Actually, I'm kind of cheating because I use https://github.com/davidhalter/jedi-vim for that purpose: allows me to jump to definitions with <leader>d ;)
Excellent plugin, and doesn't require an LSP.
As a result, you don't lose flow and end up reading considerably more code than you would have otherwise.