This UK study is an anecdotal data point. It is not a controlled study, it is just comparing project A to project B that differ, among other thing in the languages they were written in (and probably much more!). It doesn&#x27;t tell us very much for sure, but again adds to the anecdotes that can shape our judgement.<p>Of course, useful has a low bar, but it also has a magnitude (X is useful if it is used, it might not be very useful though).<p>Incidentally, stock markets have been big on Lisp and Smalltalk, two languages not known for static typing. It turns out that language X is always used in the stock market, where X is the latest hot language (Scala, Haskell, Clojure...).