alt Hacker NewsPython is one the most popular programming languages. Ruby fits into a similar category as Python (high level, interpreted scripting language, very dynamic, has a rich ecosystem with tons of existing code). Being faster than Python makes it more attractive to use, or port Python codebases to.
Nobody cares about Ruby outside of RoR
Python is one of the Lingua Franca of scientific, data, and most importantly, ai communities
Has much bigger community than Ruby
Has much, much better tooling story
Has much better gradual typing story
Isn’t THAT much slower than Ruby, there are far more attractive targets than Ruby if you care about performance