That is a severe overstatement.

The Supreme Court ruled in Georgia vs public.resource.org, which was very much not about building codes. P.R.Org actually does have another ongoing lawsuit that is similar to UpCode's: American Society for Testing and Materials et al. v. Public.Resource.Org

The UpCode ruling was at the district court level, and merely cited the ruling from Georgia vs public.resource.org.

Until we get at least appellate level decisions on the copyrightability of enacted codes, I'm unlikely to feel satisfied.