You need both statically typed language and interpreted ones. But interpreted languages should only be the glue that is used with restrain and care, it shouldn'

You need both statically typed language and interpreted ones. But interpreted languages should only be the glue that is used with restrain and care, it shouldn't be the heart of a system. You said it yourself, sometimes you need things to be done faster, but most of the time systems should be robust. Python is an excellent companion to Java. Python is one of the most versatile language out there while Java is one of the most robust.