When building a large system, the choice of language is always non-binary. You do not have to commit to one and only one language for the entire system. Python

When building a large system, the choice of language is always non-binary. You do not have to commit to one and only one language for the entire system. Python offers a great stating point for most cases. When you scale, certain modules will start becoming the bottlenecks. At this point one can just re-write the given module as a sidecar and Python by design is easy to bind external libraries.