A footnote to this is that ClojureScript bet heavily on the Closure compiler, at a time when, IIRC, it wasn't even open sourced. In particularly, it was not jus

A footnote to this is that ClojureScript bet heavily on the Closure compiler, at a time when, IIRC, it wasn't even open sourced. In particularly, it was not just a bet on the technology, but the underlying methodology, so ClojureScript was designed to produce a lot of JS that the Closure compiler would find easy to optimise. A solid and clever design, but a bet on the wrong ecosystem.