Society treated twitter as something more, and twitter adapted as it grew.

Despite the recent disruptive events, society still treats twitter as a public square. Politicians, celebrities, charities, and governments all make announcements there. So many updates on the russian invasion of Ukraine have been put on twitter but not facebook or instagram.

My personal opinion is that twitter is a public square. I don't know what that means legally, because it is an international public square with all the judicial/governmental chaos that implies. I guess an alternative would be to have "twitter is a USA public square" kind of language on the site, but that may well dampen any participation from non-US people.