In my experience, code navigation features are necessary for writing code comfortably. If you mean only auto-complete by LSP, then yes, it saves you some typing

In my experience, code navigation features are necessary for writing code comfortably. If you mean only auto-complete by LSP, then yes, it saves you some typing or function lookup, but that’s not the main benefit for me. Years ago, I worked for a long time using Smalltalk (VisualAge Smalltalk, to be more specific). Older Smalltalk versions didn’t have autocomplete. But it wasn’t a problem because Smalltalk has excellent code navigation features: find implementations of a message, find callers, and evaluate code inline. With those features and some code conventions, I never felt the need for autocomplete. Perhaps it’s my Smalltalk legacy, but nowadays, I use the most Cmd/Ctrl-Click to navigate to the implementation, read the sources, and use the “find references” feature. I don’t know if the LSP implements those features, but reading the sources gives me much more information. Before programming in Smalltalk, I did some C++ and Java programming. While all Java IDEs had autocomplete, C++ autocomplete was unreliable on most tools I used. The solution is to read the docs and the source using search tools across the code base and third-party sources.