The Zarfian Cruelty Scale is 23 years old as of last month. That's not a numerically interesting anniversary, but it's respectable age for a offhand scrap of critical theory that still gets mentioned regularly.
I am pleased and amused by the Cruelty Scale's continuing currency. But I also worry that people might apply it more broadly or rigidly than it deserves. The Cruelty Scale has had caveats almost from the beginning; it embodies many 1996-ish assumptions about IF and game design. I think it's time to, at minimum, dig into those assumptions. We should make sure we know what we're thinking when we use it.