Free speech on Twitter? During the COVID "vaccination" campaign, I saw accounts being terminated for trying to share information that went against the mainstream narrative. My account also was suspended. Here is a testimony:

In my tweets, I showed verifiable information, with links to source documents, often peer-reviewed clinical studies, about PCR “test” inaccuracy, mask-wearing hazards, and then risks (actually, huge, glaring red-flag risks) of the new COVID vaccines. That was a bit much for the old Twitter, and on February 19, 2021, Old Twitter was done with me.

Source: https://archive.li/Lpn8q

That campaign is over, so now we have the "new" Twitter. But there are other campaigns and censorship is about to get even uglier, especially with AI able to scour the entire internet for offending content.