It is only due to my laziness pure and simple.
If I already had the linkages and the proper four pole switch in hand I might make the time to install it, wire it up and adjust it to work as designed. I'm not against having the feature at all. I may eventually cross paths with the right hardware at a good price but until then I will muddle through without it. Not having it hurts nothing.
Stopping to engage direct drive is no problem for me because I only use it when towing. Been doing it that way for 13 years all over the continental US and never met an incline Rusty couldn't climb.