Every language has it's pitfalls. There isn't one single greatest language for everything. Within an application domain one needs to consider the tradeoff between machine-time and human development-time and determine what the best tool for the job is.

A 5minute run-time in Python might be acceptable if it takes you 1 hour to write it and are only going to use it once; whereas you may not even know how to program in OCaml even though it offers the best run-time.