Yes, a wiki would be ideal, if there was enough of the most interesting and relevant content already available. Actually, StackOverflow questions sometimes turn

Yes, a wiki would be ideal, if there was enough of the most interesting and relevant content already available. Actually, StackOverflow questions sometimes turn into a community wiki's when the question gains enough support. My reasons for a Q&A are: (1) remove barriers from being able to contribute using any format at your disposal (maybe even a tweet?). (2) The site should allow the community to rank the most relevant and interesting answers - this can easily get lost in a long wiki page, (3) Not all answers are relevant nor interesting to everyone, given your education level, background, etc. The experience could be tailored to the visitor ..somehow. (4) Getting a bite-sized motivation while reading through a few short answers can be good enough for some people.