A language cannot survive if it doesn't compete for adoption in the software industry, ie. paid jobs, and with so many languages competing for adoption Clojure's lacklustre marketing has cemented it's place in the history of also-rans. That doesn't mean Clojure isn't a great language. In fact I'd say it's the best language we have today.
Language viability isn't a zero sum game. What you ultimately care about is that the language is actively developed, and that there is a viable ecosystem around it. Clojure has both those things, with plenty of companies using it to do real world work.
