It happens now and then that I have answered a question here at CogSci and that shortly after a way better answer is posted on that same question. In many cases the second and subsequent answers were probably spurred by mine, as any answer instantly bumps the question on top of the "active" list. This is of course a great thing. The more answers, the better! However, in some cases the following answers are basically making my answer kind of superfluous. A great example is this one: How does this illusion - that I just inadvertently created - work?. The answer by MariaAnt is of great quality, clearly overshadowing mine (not upvoted). My answer was really initiated by the fact the question seemed to go unanswered.
Should I delete my underdog answer? Or leave it in place to ramp up the #answers-per-question statistic in Area51? My personal hunch is - remove clutter. My answer is not upvoted, and will never be upvoted given the answer by MariaAnt.
PS: of course, when a question is upvoted or really adds something I leave it in place.