If you have a factory moving on a pre-electricity prime-mover (probably a coal engine) and distribution system (probably axes and belts everywhere) and some one comes and pitches you electricity, you don't see the advantages. You see the costs of putting electric motors in all your machines, hiring all these expensive electric engineers and technicians, and basically rebuilding your factory for electricity. I see a similar dilemma here. Most industrial units will have to be rebuilt to take advantage of industrial IoT.