OverlanderJK
Resident Smartass
Forgive my ignorance, why do you feel he was 'pretty dumb'? After all, owner manual says shift in/out of 4H is good up to 50MPH. Granted 'any' speed with mismatched gearing could be fatal, but that's a side issue. (50'something as I recall w/o manual in front of me)
I've had 5 4x4s now, all shift on the fly just fine. While I honor the guidance regarding when to shift, I'm more focused on going to a neutral throttle (minimal loading) when I flip the switch/lever/button/whatever actuator is. I like the JK's shift in particular: Nice, solid transfer with a solid yank of the lever.
If you are going 30mph on a road it's retarded. If you need me to explain that I feel sorry for you.