[seanwilson]

> However, I think dynamic typing forces a certain familiarity with the codebase that can prove really useful. Yes, it slows learning down, yes it rules the lower end of the spectrum of developers out, but there are still benefits to this required familiarity.

Useful in what way? I don't see how static typing is going to make you less familiar with a codebase. Good use of types provides a certain amount of documentation for free as well.