Fortunately or unfortunately, the newer diesel trucks have to have this feature, so at some point in time , all diesel trucks in the fleet will have this feature. I've noticed with the cold weather we've had here in the Northeast that even trucks going at highway speeds for considerable lengths of time and distance still required the parked regeneration.
It was so cold that the truck exhaust system could not generate the necessary heat needed to do the "passive" regeneration. Even parked vehicles doing an active regeneration had a problem building up to the necessary temperatures(particularly on the Sterlings).
In that case the regeneration would have to take place in an enclosed warm area like the shop or parked somewhere else to await a warmer day to do the "regen".