1.) Clojure fell back
2.) Elixir, though small, is still moving forward
I've been a fan of Clojure since 2009. It grew rapidly for a few years, from 2009 till at least 2014. It has stalled out. This makes me sad because I've loved working with it and I think it a great community, in most ways. But it is true that the community has been unable to answer some of the criticisms leveled against it. The reliance on Emacs has meant it is not easy for beginners. On the other side, the elite (the purists?) have wanted to see Clojure be more like Scheme, or more like Racket, or more like Haskell. Clojure has offered up many interesting ideas, but perhaps hasn't quite built a complete eco-system that makes it broadly appealing.
Elixir, though very small, still seems to be moving forward, and perhaps has a chance to answer some of the demands that people made of Clojure (more pure? easier syntax?). Maybe Elixir is the language that make the Functional style the dominant style in computer programming?