What was the most underrated answer in 2016?
Underrated could mean that an answer recieved little attention/upvotes despite being of excellent quality.
Vote either by posting an answer linking to an underrated answer and giving a brief description of why that answer should win, or by upvoting an existing post. Voting lasts two weeks, i.e. until Jan 29 2017.
This is part of the Best-of PSE 2016. If you are interested in providing a prize bounty for the winner (mostly highly upvoted answer of this meta post), please comment.