Some of the top reasons for me: * immutability with persistent data structures * csp with core.async * encourages designing a data-driven functional core wit

Some of the top reasons for me: * immutability with persistent data structures * csp with core.async * encourages designing a data-driven functional core with an imperative shell * powerful REPL (better than python / scheme / racket, worse than SBCL) * multi-platform (backend / browser / mobile through react native) * easy and comprehensive testing because of several factors: functional nature, dynamic binding of vars, generative testing, etc.