Comment by chenzhekl

This is exactly the same as what MS did for the Python extension when the open-source LSP was replaced by the proprietary Pylance. I get the feeling that MS becomes more and more likes Google. For example, on Android, the core experience is provided by GMS while the AOSP is provided as an open-source core. In terms of VSCode, the core editor is free and open-source, but some key experience is baked by proprietary components (e.g., Remote plugins, Pylance, etc.). And the trending is that more and more plugins which are controlled by MS are moving towards to a mixture of open-source code and proprietary components.