SCOTUS is still considering the ACA and, with RGB replaced by ACB, I figure it is much higher than 50% that it will be overturned. What is likely to happen then?

Severability
In law, severability (sometimes known as salvatorius, from Latin) refers to a provision in a contract or piece of legislation which states that if some of the terms are held to be illegal or otherwise unenforceable, the remainder should still apply. Sometimes, severability clauses will state that some provisions to the contract are so essential to the contract's purpose that if they are illegal or unenforceable, the contract as a whole will be voided. However, in many legal jurisdictions, a sever...