What does it mean for a language "not to use an LSP"? The most straightforward way I can think to interpret that statement is that it's saying that a TypeScript

What does it mean for a language "not to use an LSP"? The most straightforward way I can think to interpret that statement is that it's saying that a TypeScript language server doesn't exist at all, which certainly doesn't seem to be the case based on finding https://github.com/typescript-language-server https://github.com/typescript-language-server as the top result when googling "typescript language server". I guess you might be saying that it's not a first-party language server, but I'm not really sure why that would be relevant when discussing properties of language server implementations; the implementation clearly exists, and even if very few people are using it, that doesn't mean GP's point about a flaw in its design wouldn't still apply.