I would love to know what makes a bumper airbag compliant aren't all airbags triggered by a g sensor and nothing that's in the bumper itself. The only thing that I can think that would make them complaint is that they fold like tin foil when hit with any real force.
Crumple zones, ARB builds their bumpers to crush within a designed parameter as mandated by Federal standards in both their countries and ours. Many vehicles (Toyota's) use a deccelerometer which is a function of time. A bumper without any 'crumple' factor will go from say 30 to 0 in x amount of time, that derivative is the deceleration. Have a super-heavy duty bumper with zero give and that time is greatly reduced (we are talking milliseconds here). Therefore, instead of your airbags deploying in a ~8mph wreck as mandated, it could deploy in say a 4 mph or 3mph.
Now, I don't know jack about the ARB Jeep winchbar lineup so I can't say they have crumple brackets but in many of the Toyota applications I deal with they have replaceable crumple brackets that are engineered to fold in an accident yet have the ability to not unfold for winching, if you've ever seen the actual bracketry is pure genius. This is far more of an issue in Aussie and Europe in which auto safety standards are far more stringent than here in the US. Toyota, Nissan, Ford and others use non-badged ARB bumpers OE in Aussie and other foreign markets, yet another factor in their decision to certify their bumpers as air bag compliant and tested. An admit-able non-issue for many, that's your decision to make.
As for needing the upper bar protection...
last I checked there were plenty of deer and livestock roaming the wilds in Utah. I've had quite a few near misses and on a Henry's mountain trip literally had to use my bullbar to nudge a stubborn cow off the trail. Just got this note from one of my customers in Montana:
"Got my ARB bumper put on that I bought from you when I came down and picked it up. My wife hit a deer last night doing about 45mph, hurt the deer and put a dent in the hood but everyone is fine, except for the deer of course. Didn't put a scratch on the bumper. My third ARB bumper, if anyone ever doubts whether they are worth it or not, have them call me. Thanks again!"
looks and not actual functionality then by all means slap an ARB on the front of it.
Interesting perspective. Funny, my non-functional yet good "looking" ARB winchbar has navigated me all over the western US without fail, 20k+ miles off-road, winching, recoveries, you name it. I must be special, zero dents, zero bent brackets, zero cooling issues. No wonder DMC's u-joint failed in Chile, he was using an ARB bumper on his Alaska to Argentina trip lol[/chest thumping]
Would it be my first choice for a rock-crawler? Absolutely not... for camping rig, overland rig, expedition rig, whatever new label we are giving it rig, its a proven and viable option. Again my experiences are 100% Toyota, the Jeep stuff could be 180* different in terms of value to benefit but in the Toyota realm these 'function' bumpers your referring to are no different in price and in many cases offer less benefits and protection.