Why do some people answer in comments?
I have noticed it's fairly common for users to add a comment to a question rather than posting their solution as an answer which could be accepted for points. Because of this, I sometimes worry that I'm violating protocol by posting an answer.
What I refer to are not requests for clarification, but genuine answers which often do go on to receive many comment votes.
Why is this done?
(Note: My experience is mostly on Stack Overflow, but I will assume other sites are similar.)