https://www.cfr.org/in-brief/trump-and-section-230-what-know
We can assume that Twitter was a vocal opponent to the repeal at the time and that they have now become somewhat more in favour if it means knocking out their competition whilst they enjoy special protection.
All it would take is some catalytic content to kick things off and a compliant state judiciary to get the ball rolling.
Bluesky's Terms Of Service explicitly state that they are not liable for the impacts of their user's content. They say they reserve the right to delete content or accounts at any time at their discretion. And then there's this:
Indemnity: Summary: If someone brings a legal claim against us based on your actions on Bluesky Social, you are responsible for our defense in, and the consequences of, that claim.
It all looks bulletproof on the surface but I just don't know if it will survive under Trump/Musk.