I agree with what you're saying and will add I think ABS will mature as a technology, get cheaper, lighter and better, and become even more widely adopted than avalung eventually The avalung is still very good at what it does, provided it is positioned before you need it. It also deals with NARSIDs incidents that an airbag can't.
One of the challenges of avy survival and rescue gear is making it acceptable to wear and carry it INBOUNDS. Skiers at places like Snowbird, Jackson, Whistler, Fernie, Revelstoke, Aspen, Vail, A-Basin, Baker, and to some extent Kirkwood, Mammoth and Squaw (I'm sure there are others) have a fair amount of potential exposure both inbounds and in sidecountry. The problem is its kind of like Richie Rich's full-face helmet to carry avy gear. It actually might make sense, but its its not "cool" to be too core; especially inbounds. I could be wrong but at least two of the three people involved in recent avalanches owned and had access to such gear and weren't carrying it. Anyway, you never know but that the guy with the backpack, probe, shovel and beacon in the lift line people were laughing at, could later become someone's rescuer. I don't look for ski area management to start encouraging this safety trend. They really don't want the tourists to think such risks could occur. Newfydog wasn't even allowed to discuss his incident when it happened, and the thread he started concerning that was deleted by him at SAM's request.
As far as fat skis and avy safety go, I was not questioning the advantage of fat skis, rather objecting to the creation of the notion that fat skis save lives by reducing the risk that snow will fracture. There is absolutely no corroborating evidence for this, nor afaik even a study. If you are relying on skis 30 mm wider at the waist to keep you alive in avalanche terrain, you are paying attention to the wrong clues. Wide skis and snowboards are not an avy mitigation measure, and since I had read that twice from Josh, I thought it was time to put an end to it. It remains an interesting theroetical debate, but has no place in a discussion directed at a novice asking about inbounds avy safety.