The Supreme Court tends to issue narrow opinions only on the case or controversy (Article III, Section 2) before it. The Court does not decide on matters not be

The Supreme Court tends to issue narrow opinions only on the case or controversy (Article III, Section 2) before it. The Court does not decide on matters not before it, so if the issue before it was about "serious crimes". The case was originally brought against Louisiana which had laws that distinguished between different kinds of crimes. Quoting the Fourth Circuit's decision in Ramos v. Louisiana: "Additionally, La. C.Cr.P. art. 782(A) provides in part that “[c]ases in which punishment is necessarily confinement at hard labor shall be tried by a jury composed of twelve jurors, ten of whom must concur to render a verdict.” If the Court said nothing of other ways of classifying crimes, then that is all that means. It doesn't mean that it's constitutional, it's just that the court doesn't rule on cases and controversies that are not before it.