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Disclaimer: I haven't reviewed in ages. I just see 55k and think, What's the point?
This leads me to wonder if it might not make a psychological difference (and maybe calm the robo-reviewers?) If there was just a simple 'There is something to review' message, and no indication of 'pressure'. (Just imagine if the Google Image Labeller had said "2,352,342 images left to label", would you have played?)