For JavaScript related questions, most of the code is posted on jsFiddle and other similar web sites. Also, answers are posted in jsFiddle, modified from the original questions.
It just dawned on me that if these sites go offline permanently without any successor, the questions and answers would have lost relevant information.
Is my concern reasonable? If so, what should we do to prevent such possible loss of significant information?
Update
The discussion on Are answers that just contain links elsewhere really "good answers"? contains a better discussion on the issue I've raised.