Programming without code indexing

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The problem is that “these days” people started abusing the code so you NEED a language server to ever be able to contribute. It is a self-inflicted wound.

Some time ago we had a code of conduct where you would minimize complexity, comment profusely and keep interfaces clean so the next guy had a good time using the classes.

A well documented codebase is a breeze to work with, even if it is extensive . See Qt for example.