Maybe cost prohibitive to have AWS? I don't know what percentage of tractors New Holland sells with SuperSteer, but there might not be enough demand for the added benefit of a tighter turning radius? SuperSteer is about $1000 extra, what would AWS add in cost and how much tighter would the turning radius get for that added cost?
I remember the Honda AWS from several years ago, but that was probably a lawn tractor, and I think Honda exited the tractor business (at least I don't see them advertised for the past few years).
I guess my question is what size CUT would you want AWS and what would its primary job be?
Sub-Compact CUTS like the mini-Masseys and mini-Kubotas already turn pretty tight and make fine lawn mowers as well as offering lots of other capabilities.
Compacts like the NH TC18D and TC24D, the smaller JD 4xTEN series, etc are not as good for lawn mowing chores as the mini-tractors becuase they don't turn quite as tight, but they are very nice small tractors that are capable of real tractor stuff, they can get into horse stalls, dig ditches, etc.
As you scale up in size, NH offers the SuperSteer option. I suppose it would be nice to turn a 30hp+ size tractor is a smaller circle, but my first real tractor was an 40 year old Oliver and that took about a 1/4 of an acre to turn around so I am pretty happy with the CUTs and how they turn.