I think it’s much simpler than that. Ruby didn’t have good documentation in English until the mid-2000’s. Python was in use by the English-speaking world before the turn of the century. Documentation + you can generally understand it at a glance == total Python dominance.
Looking at recent Python code, it also seems like the simplicity is being lost in the rush to add features.
Looking at recent Python code, it also seems like the simplicity is being lost in the rush to add features.