We use Clojure in our startup and it significantly speeds up development for us. Also, the resulting code runs correctly and many classes of bugs are eliminated

We use Clojure in our startup and it significantly speeds up development for us. Also, the resulting code runs correctly and many classes of bugs are eliminated just because of the language. Clojure really shines in complex concurrent applications. In our case, it's a search engine for e-commerce, offered as SaaS, with instant search (so speed really matters). Without Clojure it would have been much more difficult to manage problems like concurrent switching to a new index while queries are being serviced. I was initially skeptical and worried about implementation quality, but over 1.5 years of development we found exactly ZERO bugs in the language itself. So there is beef. Start using Clojure and you'll find it.