But how was he to know the show would be a hit with audiences? He doesn't (I assume) have a crystal ball, a deck of tarot cards, or anything other method to predict the future. The perspective that you're looking for in a review of a new production that's run only a few weeks of previews is one that can only be found after reviewing some future performance when he could write about his initial impression, how, if at all, his perspective has changed in the intervening years, and also incorporate thoughts on its incredible popularity with audiences over time.