[majormajor]

> In order to scale, Ruby applications need very high coverage. This has nothing to do with Ruby and/or Rails though; it's a requirement of all the dynamically typed languages.

I don't think typed languages all get you away from this. You're gonna learn things that make you want to refactor things. Your standard typed Java app isn't going to get away without tests, there, since compile != correct for the vast majority of program designs.

You might be able to get "less obviously broken" for free - logic bugs but no 500 errors from unexpected exceptions, say - but is that so much better?