""" 'Free speech' means absolutely nothing can be off limits, ever, because in some theoretical future timeline, that means we won't be able to voice controversial opinions. Bluntly, if oven memes are at risk, then that means we won't be able to have dialogue on race relations or tax policy. """
You're right that, in general, this has been the state of affairs on Twitter, and it's a top-3 reason why a lot of people are interested in exiting that platform. Few want to spend time in a 4chan dystopia.