One of the at least occasionally useful strengths of Clojure over Haskell is the pragmatic choice Rich Hickey made by building on top of Java. This has continued with Clojurescript (Javascript) and others like Clojure on CLI, objc, etc. What this means to me is that on the occasions when I'm faced with a task like having to produce a Microsoft Excel file readable by an array of Excel versions I can leverage the wide range of libraries available in the parent environment (Apache POI, http://poi.apache.org/). The attention paid to the facilities to interoperate with the underlying ecosystem means that even given the relatively short history of Clojure it is likely that someone has already done at least some of the work to make it pleasant to use in Clojure (https://clojars.org/org.clojars.boechat107/cloxls).