[thaeli]

The biggest problem with SE for me, and this is related to the culture issues you're talking about, is that the site has no good way of deprecating "formerly correct" answers. Even if a better, more correct answer is posted later, the reputation system has a huge incumbency bias in favor of older answers that have accumulated upvotes by being the best available answer at the time.

Their knowledge repository is slowly rotting under the weight of having to ask every time "okay, is this correct-sounding, highly upvoted answer actually (still) correct, or is it 10 years out of date?"