I second both of the concerns here.
I think the default configuration for unified-language-server is potentially outdated because it’s looking for src/server.js, but this file doesn’t exist in latest (4.0.1).
Additionally, Jupyter LSP should have an option for ignoring some languages. It’s silly that having a raw cell in a notebook adds (additional servers needed) to the bottom toolbar. I don’t really want a language server for markdown, but I definitely don’t want one for plain text.