Pangram gets brought up a lot because if I read an article and think it's blatant AI slop and want to communicate that fact, a natural impulse is to provide some sort of objective corroboration rather than just asserting that I have superior taste and thus am able to tell.

Also Pangram is basically the only AI detector that's actually put in the work to build an accurate classifier, so if you try to discuss AI writing detection without being specific that you mean Pangram you'll get half a dozen commenters screaming about how awful some of the snake-oil salesmen like GPTZero are.