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by Beltalowda 1575 days ago
The thing that Stack Overflow changed is that it really encouraged to ask 1) clear questions, and 2) provide comprehensive answers. Stack Overflow didn't really "invent" this (at least Experts Exchange preceded – and influenced – it), but they did popularize it.

Compared to email threads and forums it really improved things: the no-nonsense format and the ability to edit questions and answers to clarify or expand things really made a big improvement. It's just so much better than reading through a 3-page forum thread with bits and pieces of information scattered all over the place.