> I'm not really ever seeing problems where I'm stuffing an integer into where I wanted a string in dynamic languages. If you are writing all of your code from

> I'm not really ever seeing problems where I'm stuffing an integer into where I wanted a string in dynamic languages. If you are writing all of your code from scratch, then it doesn't happen too often. You usually have enough of the current context in your head to avoid most type level mistakes. The real strengths come from two situations. The first is refactoring. There is just no contest here. Having every single place where your change affects the test of the program identified automatically is extremely useful. The second is returning to old code and either trying to understand it or make small changes to it.