You appear to be ignoring who this coming from. Instagram is huge, and they built their service with Python. It isn’t coming from someone who is arguing this is

You appear to be ignoring who this coming from. Instagram is huge, and they built their service with Python. It isn’t coming from someone who is arguing this is how it should be done from the beginning. Hell, given the typical lifecycle of a startup, this situation occurs exactly because a dynamic language is chosen to speed getting a product to market and try to build a business around it.