> None of the TypeScript teams got past level 5. All of the rest got past level 15.
The TypeScript-using teams also wrote a bunch of machine-verifiable documentation and code navigation tools, so I'm not surprised it was slower. I can tell you without even looking at them which codebases will tend to be more pleasant to join as a new developer. Though probably doing that extra, unrewarded work for some kind of challenge where speed is paramount wasn't the best idea.
The TypeScript-using teams also wrote a bunch of machine-verifiable documentation and code navigation tools, so I'm not surprised it was slower. I can tell you without even looking at them which codebases will tend to be more pleasant to join as a new developer. Though probably doing that extra, unrewarded work for some kind of challenge where speed is paramount wasn't the best idea.