I agree there will always be the race DIN sole...and that will become the exception and not the norm. Again, wile I am using Gripwalk myself and I like it, I still think it was an unnecessary change for the average consumer.
I think the hangover is jsut starting and will go on for the next few years. There are too many bindings that are still in circulation that are not GW compatible and really have no reason to come out of use. I am fortunate to be on the front lines as a bootfitter and while there are GW options now and as it becomes more and more of a standard, there are still the consumers out there on a 5-6 year old Volkl RTM80, which is a fine ski have limited options when choosing a boot. While this is consideration at a specialty shop where you will have a better bootfitter, it is a concern at a big box store where Joe and Jane Skier is dealing with Chad who is scheduled in the ski department after a week in backpacking and his only training is a "Go get 'em tiger" and to ask the customer "what shoe size they are?" and if they say 9, put them in a 27.5, because 2+7=9.
The next time you are in the lift line, just look around how many non indemnified bindings there are...many with newer boots that were probably adjusted (but not tested) with a newer boot. These boots very well were purchased on line or swaps san skis and the adjustments were done prbably at home. Now, also notice how many GW boots are in bindings that are not GW compatible. I am sure msot of these people, even if they were told that they needed a GW compatible binding got the boot home, slammed it in the bindings and said to themselves "That salesperson was jus trying to sell me a binding, these work fine". Yes, they can get squeezed in the binding, but forget that binding releasing in a twisting fall.