Costs need to think in terms of the entire ecosystem: the time spent creating the answers, the time spent writing official documentation that isn't consulted, and the time saved finding the answer faster.
Many technical writers and documentation teams from large corporations have been reaching out to me on this topic, they are definitely interested in learning how to adapt their processes based on Stack Overflow's success.
But not everything is roses. Providing answers can be [slow](http://blog.ninlabs.com/2012/05/crowd-documentation/), unanswered questions are rising, and [users stop doing actions](http://research.cs.queensu.ca/~scott/papers/MSR2013.pdf) that lead to badges as soon as they achieve them. On recent field study at a large industrial company, when learning WPF, they relied on books, and internal seminars to learn new concepts because Stack Overflow at the time did not have sufficient saturation on examples yet. As seen with [another study](http://blog.leif.me/2013/11/how-software-developers-use-twit...) on twitter usage, in some contexts, the subject matter and available of easily accessible experts makes looking online less effective.
I work at Stack Overflow and we are very liberal in sharing our data when it doesn't involve PII. If there is any way I can help you, I am sklivvz@ our domain name.
Costs need to think in terms of the entire ecosystem: the time spent creating the answers, the time spent writing official documentation that isn't consulted, and the time saved finding the answer faster. Many technical writers and documentation teams from large corporations have been reaching out to me on this topic, they are definitely interested in learning how to adapt their processes based on Stack Overflow's success.
But not everything is roses. Providing answers can be [slow](http://blog.ninlabs.com/2012/05/crowd-documentation/), unanswered questions are rising, and [users stop doing actions](http://research.cs.queensu.ca/~scott/papers/MSR2013.pdf) that lead to badges as soon as they achieve them. On recent field study at a large industrial company, when learning WPF, they relied on books, and internal seminars to learn new concepts because Stack Overflow at the time did not have sufficient saturation on examples yet. As seen with [another study](http://blog.leif.me/2013/11/how-software-developers-use-twit...) on twitter usage, in some contexts, the subject matter and available of easily accessible experts makes looking online less effective.