>In about 22 years of writing ruby code, I have never ran into a situation once where I would have caught a bug through types. I've definitely ran into that al

>In about 22 years of writing ruby code, I have never ran into a situation once where I would have caught a bug through types. I've definitely ran into that although much less common at places with good test discipline. I think the related and often conflated problem is errors caught by compilers which you don't hit til runtime in Ruby/Python without good test coverage. For example, referencing an undefined variable