That's debatable. We can't go back in history, but if it were not for ML/data science, I believe python 3 would have killed python. At that time web dev / CLI utilities were major use cases, and that was the time golang became mainstream.

Data science, and then ofc DL being done through python just when python 3 was kinda usable (around 3.3/3.4) was a struck of luck timing-wise.