What is the current state of the law on the right of a "responsible law-abiding citizen" to carry a gun openly outside of the home?

There was a glimmer of good sense in Young v. Hawaii , where a panel of our court held that the Second Amendment "encompasses the right of a responsible law-abiding citizen to carry a firearm openly for self-defense outside of the home." 896 F.3d 1044, 1048 (9th Cir. 2018), reh'g en banc granted , 915 F.3d 681 (9th Cir. 2019). That panel astutely recognized and avoided the same problem we see in Mai that the reasonable fit standard was significantly weaker than it ought to be:

[974 F.3d 1104]