The sysadmin tag has a different meaning almost every question, and it never seems to refer to the actual role of a system administrator. It seems to be used for questions that have to do with the management of a system, but that has zero categorization usefulness - the tag for the product being managed should be applied instead.
Since this question got over forty upvotes without a single downvote, and considering that there were only a few dozen questions with the tag, I went ahead and destroyed it over the past couple days. (I also polished up the tagged questions as I went, of course.)
RIP sysadmin: 2011-2016.