I would like to propose an "alternate" to "edit answer". It seems to me that sometimes a question has too many answers to parse through. Often I think this is because everyone wants to get the reputation for upvotes. I know I've been there and done that, but lately, I've had a change of heart. I see no point in adding another answer when all I'm really offering is "extended information" from a possibly correct answer already given.
It seems like more might be encouraged to "edit an answer" if there were some sort of "extend" button to click instead, whereby the original answer is not "edited" but instead, added upon by the user. Thus adding the user to the Answers upvotes, though perhaps at slightly less than the normal 10 points. This might encourage more users to do as I have done in some cases and simply "extend" an already given answer, thus providing all the extra information in one spot, making it easier for future users to find all the information they need in as concise an area as possible.
I'm sure there are plenty of cons to this as I haven't thought it all the way through yet, but it just seemed like a good idea when I was "extending" another answer a few minutes ago.