> ...when the popular platforms stop being free speech platforms.

No, this always happens, any time you get more than two people in one room together. Eventually, intolerable assholes drive either everyone else away, or they get driven away.

Meanwhile, people who aren't bothered by that particular intolerable asshole shrug their shoulders, and ask 'What's the big deal?', and 'Can't we all just be rational robots who get along?', and 'This is purely an intellectual conversation, the outcome of which has absolutely no material bearing on my life, why are people getting so worked up over this?'