Yeah, I disagree with "ruthlessly productive" as a blanket statement because of this. I tend to find that a huge chunk of the time I save at write-time in Ruby (Rails)/Python/etc., I end up repaying at either runtime (nil exceptions) or read/explain-to-other-dev/refactor times, sometimes in multiplicative form (chasing down why something became nil, or a string, or an elephant, but only if the ORM did X, Y, and Z to the DB response, etc. gets ridiculous quickly)