Given that the site is now ten years old, the pollsters may decide that we should start to repeat old polls, but then at least repeat the really interesting ones please. Monks can vote on old polls (I went through all of them once), there's an official link to this from polls, and you don't even need votes or level for this. Thus, IMO we should not repeat a poll just because there are lots of new monks that weren't here when it was originally on, but only if there's a reason to believe that the opinions of many monks that have voted on the old poll have changed since.
In theory, there could also be an option of making an existing old poll to appear in the voting booth nodelet again, as a way to direct attention to it.
Update. Let me also note that the official instructions How do I create a Poll? ask you to read all the past polls.