The chance of my implementation being folded into Clojure, as opposed to whatever Rich writes himself, is definitely tiny. But there's no telling when he might get around to it, so the best way to stay sane is to assume it will never happen.

Clojure occupies a really nice local maximum, and I don't think any other language is trying to compete for that niche. Since Clojure is just a Java library, it's relatively easy for you to extend or replace any part of it, so I don't think the future is a concern for anyone who enjoys the language and is motivated to use it.

Rather, I worry about the growth of the community, since that's largely predicated on the out-of-the-box experience. As an author and consultant who is focused on Clojure, that affects me far more than a company which builds its product using Clojure (assuming you're willing to hire people with an interest in FP and teach them the rest in their first month). I don't claim expertise in how to grow a community around a language, but it seems to be at best a part-time job for the people at Cognitect, which is not ideal.