I've noticed old questions revived because a new user posted an answer. If the new answer adds information, that is good. But many new answers to old Qs add nothing to the answers posted more than a year ago. (Often these answers are not only uninformative, but poorly worded and otherwise bad.) See, for example, If you say in English: wear the pants in a relationship, then can you also say wear the skirt in a relationship?
Sven Yargs posted a Yargsian answer in March 2014. After he posted his answer, two new users posted less than Yargs had already told us.
I suggest adding a new category for flagging an answer
o adds nothing to previous answers or o adds nothing to the accepted answer
On the other hand, I am grateful that this question was brought up, because of the masterly Yargs answer. Should we tolerate the clutter because of the goodies that are disinterred?