This post relies on the assumption that all dynamic languages are an order of magnitude slower than java. Not very long ago, the OP would have used the same arg

This post relies on the assumption that all dynamic languages are an order of magnitude slower than java. Not very long ago, the OP would have used the same argument in favor of C++, and against java. In fact- many dynamic languages have proven To perform better than traditional ones in some areas, such as javascript on node for web-dev. Clojure, for example is WAY faster than python. Incremental typing can squeeze out some additional power as well.