Somehow, Microsoft managed to invent LSP for VSCode and then abandon some parts of it just a couple of years later -- e.g. python language server is dead, pylance is there instead, closed source, VSCode-specific and with prohibitive license. Most language plugins in VSCode don't use LSP anymore IIRC.
While it may be true that pylance is closed source and vscode specific, pyright[1] is MIT. Pylance does appear to still be a language server as well. As far as I know, most language plugins still use LSP, including Typescript/Javascript, Rust, and Go.
