I never really got the seethe over the lack of a king's gate on the older Henry rifles. It's not the dangerous loading system from the OG henry rifles and yes, if I was facing a bunch of injuns, I'd want a king's gate. But most henry rifles are used for plinking or hunting. For range use it's a non issue. .22 rifles literally had tube fed mags just like the henry rifles since the late 1800s and if it was an issue they would have fixed it long before the 10/22. For hunting, how often do you top off your mag mid hunt? hell can you even top off most of the newer detachable mag hunting rifles without dropping the mag? I don't think the unloading is a big issue because when I try to unload my henry by dumping the tube instead of running the action it jams because the one thing that jams it is trying to cycle a round from the tube/elevator into the chamber without spring pressure from the mag tube spring.
The only real problem a lack of a loading gate gives is if you are doing cow boy competition shooting. But I'd assume most of those guys buy a nicer gun than a henry