How much does clojure take advantage of its hosted status? 
Can anyone who builds clojure software for multiple runtimes comment? It would obviously be extremely nice if you could program libraries once and have them run on the JVM, CLR, and inside the Browser. In practicality how difficult&#x2F;easy is it to build cross-runtime libraries and how much reuse can you get out of clojure libs b&#x2F;c of its hosted status?