1. It's a combination that hits the sweet spot for the "alternate hard and soft layers" architecture. 2. Python is quick to write for scripts, one-offs, and th

1. It's a combination that hits the sweet spot for the "alternate hard and soft layers" architecture. 2. Python is quick to write for scripts, one-offs, and things that don't need to the performance of C++. 3. The ecosystem is fairly stable and low-drama. (Speaking as one of those C++ and Python devs.)