It sounds like the author is spending too much time way up in the hights of abstraction and needs more concrete things to work on. For instance, writing more programs -- I bet there are a lot of programs where you don't even really need variadic generics (or was it generic variadics?).

Don't get me wrong: I appreciate that people spend all this effort to design and evolve languages. But you need to ground yourself in concrete practice for many reasons, including your own sanity.

Disclaimer: I don't know anything about the author aside from what's in the article.