I don't have any great examples right now, but sometimes interesting, but old (say, from 2011), questions pop up in the right column, I look at them and the answers, and sometimes feel like an answer justifies an upvote, a downvote or a clarifying or enlightening comment.
Is there a general consensus that any question or answer, no matter how old and regardless of the presence of an accepted answer, justifies further interaction, or should old material rather be left alone?
I personally think that any material on this site could be helpful for a visitor at some point, so we should strive for the best possible quality, which also means adding to answers that have been posted 5 years ago.
Please excuse me if this topic has been covered before, but I couldn't find anything on the German meta. It might also have been discussed on a more general SE meta.