The clangd extension is better anyway, and is open source.

The Microsoft C++ extension is not open source; not sure what people were expecting here.

It's one thing for it to not be open source.

It's another thing for its license to explicitly prohibit its use with any other IDE, even if it's API-compatible, even if it's literally exactly VSCode recompiled with another name.

And it's yet another thing to proactively insert checks for that.