I've seen programmers on multiple occasions spend 30+ minutes writing a script to do what could otherwise be accomplished in less than thirty seconds with vi(m).

I often see HN users dismiss vi's approach to editing as if it were some kind of micro-optimization, but consider what impact writing the aforementioned script has on flow. It's worse than the resident office WaterCoolerGuy chewing your ear off for 30 minutes, IMO.