I've got stuck a few times due to auto hubs not engaging until the rear tires had turned enough to make them engage...at which point it was too late.
To me, auto hubs are like rain sensitive wipers. If I can't perform the simple task of locking the hubs, or can't tell when it's raining, I have no business driving.
Okay, if I end up in a wheelchair and have hand controls in the vehicle, auto hubs or CAD may be acceptable. But then I'd prefer no axle disconnects whatsoever since fixing the problem would be tricky at that point.