As a Twitter-skeptic for nearly fifteen years now, the single useful feature of Twitter was as a "global PA system", not a means of discourse. It was a way for people to announce events that might have otherwise gone unnoticed, or engage in public PR battles with monopolies and oligarchies. Which is a threat to the kinds of people Musk wants to be.

Sure, sometimes those public announcements of events were "I hate minorities" or "yo look at my dick", but the platform was a global notice board that served a positive purpose in that narrow definition.