> the SCOTUS has authority over Congress’s ability to determine SCOTUS authority.
Not really. Congress can, for example, impeach 1 or all of the supreme court justices. The supreme court cannot stop themselves from being removed from the court. They can claim authority and that they have the right to do that, but they are not above congress, they are coequal.
> Yes, officially they shouldn’t, in practice they do, and the law is what is practiced (otherwise adultery is still illegal in Minnesota).
Agreed, ultimately the ball is in congress's court (which they will most certainly drop). Congress could decide that this is the supreme court taking too much power and remove them all, but they aren't going to do that because this is likely a decision most representatives are perfectly fine with. So nothing will likely happen here. I'm just saying that this decision is one that the court never should have heard, not that practically they have heard it, and their enforcement is likely to stand.