Well, there are two ways of looking at this: 1. Decision to use Python created unnecessary extra work (your point); 2. Executing (not just prototype) with Pytho

Well, there are two ways of looking at this: 1. Decision to use Python created unnecessary extra work (your point); 2. Executing (not just prototype) with Python, then re-writing and re-optimizing your code in a 'leaner'/lower-level language is a valid approach given that's how Youtube and other highly successful Google products and services evolved. I think both are valid approaches depending on your application, available resources, nature of incentives, and the speed at which your market moves.