I think Mark realizes he got bamboozled by the FBI during the 2020 election cycle.
As for marking the line between keeping his platform safe from vicious personal attacks versus allowing freedom of speech, I also think he realizes that freedom of speech is more important than he used to think.
Hopefully, we will see others follow. Hopefully, we will see the corporate world continue to reign in their pursuit of the woke agenda and also - is it even possible? - the education world.