You are assuming that SCOTUS would uphold GFSZA Mark II, which is doubtful.
We are going on 20 years later and the new law still stands. It the current SCOTUS wants to overturn the law either plaintiffs have been lazy about bringing it to their attention or the don’t want to hear it. Bottom line is that it is still out there to capture the unwary or inattentive.
Frankly, I don’t want the inattentive wandering around schools with guns. But that’s beside the point.
It certainly does take a long time to get to SCOTUS, but I don’t think that says anything about how they’d rule. As far as I can tell, none of the challengers to the new-old law have even tried to get up there.
Even if that is true, and I don’t agree it is… nothing I wrote is incorrect. The federal government has wide authority now because a lot of stuff moves in interstate commerce.
But that authority is, contrary to your discussion, not plenary. While the gun-free school zones law has been re-crafted, the Lopez test remains the law: federal legislation under the ICC must affect either the channels of interstate commerce, the *instrumentalities[i/] of interstate commerce, persons or things in interstate commerce, or activities that substantially affect or substantially relate to interstate commerce.