Correct, but the rest of the paragraph sort of gives that impression (at least to me) by mentioning how language compilers are usually written in a more primitive language, like the Go compiler being written in C then later rewritten in Go.

IMHO that sort of blurred the line between the platform and language in the article...rewriting the Go compiler in Go sort of makes sense, but I don't see why this was a good comparison to the .NET ecosystem. Rewriting the CLR JIT in C# isn't making it "self-hosting" as its not language specific.

Does that make sense?