Besides what has already been said by the 2 parent comments: Textmate grammars had the advantage that setting up syntax highlighting for a new language (e.g. fo

Besides what has already been said by the 2 parent comments: Textmate grammars had the advantage that setting up syntax highlighting for a new language (e.g. for a simple DSL) was a pretty easy and low overhead process, and that enabled getting highlighting for dozens to hundreds of languages in lots of editors. Developing a language server is however a more complicated task - even if there would be a template that does most of the boilerplate. Therefore I would continue to welcome in-process highlighting mechanisms like textmate grammars and tree-sitter as a baseline. They could be augment by LSP features whenever a plugin author feels it's necessary. Regarding tree-sitter itself: I've read the documentation, and it looks super-interesting. I've developed textmate grammars before and wasn't really satisfied with them, tree-sitter looks like it can provide a lot better results. I would love to see those getting into VsCode and other editors too. Then good grammars can again be shared between editors! Maybe getting it into VsCode is now easier, since both are now somehow Microsoft editors? :)