I get you. By town-square use cases I mean use cases that require a consistent global view—no matter how much we try to kid ourselves that they don't. (The whole town is out there in the square, you can see them all at once from the balcony). Use cases for which the bulk of today's users simply won't accept not knowing exactly how many followers they have, or likes their latest post has, and many other such things—again no matter how much we try to kid ourselves that such things should not be so important, or that we can get away with asking users to kindly grow up and go without them. For those use cases Nostr just isn't it. Anything Twitter-esque, basically.
For your sense of the word though, certainly yes, I agree that'll be key.