This is a "free speech" guy, not a free speech guy. If Twitter follows other "free speech" platforms, it will become very one-sided. I'd expect all the newly banned folks to set up elsewhere. Maybe Mastodon, maybe something more established like Tumblr.
I don’t know if that will be the case. Previous free speech platform attempts only attracted a specific crowd - but Twitter has the opposing crowd quite firmly entrenched, so it may balance out better.