I had precisely zero errors during the entire development cycle that static typing would've detected. You never get a NoMethodError: undefined method `[]' f

I had precisely zero errors during the entire development cycle that static typing would've detected. You never get a NoMethodError: undefined method `[]' for :foo:Symbol or similar? Then you are either a much better programmer than me, or we are dealing with confirmation bias[1]. I get such errors regularly. They are trivial to fix and are caught early by tests/specs, but they are still there on a first iteration. [1] http://en.wikipedia.org/wiki/Confirmation_bias http://en.wikipedia.org/wiki/Confirmation_bias