[coldtea]

>Regarding typing errors in production, I meant that we never encountered an error that could have been directly prevented by a Java-like static type checker[1], e.g., a function with an int parameter that was called with a string argument.

That's because your devs had already suffered this bug in their test runs once too many times, and killed it before it got to production.

That, and luck.

[St-Clock]

I agree. That is why I mentioned our large test suite in my first comment.