I generally agree with most of this, part of the point of having wall space is so stuff can go along it without sitting in the middle of work space and that most cord connected workload I prefer having the service outlets under the edge of the bench with shelf below to toss connected equipment or stuff that needs to be used there. Drills, grinders etc and its still handy to plug in a cord if needed. Circuits above benches or near shelves are for more in place corded devices, all that stuff these days, battery drills; The one circuit to feed benches probably gets used as much as the general outlets in the rest of the building. I hate the cords over the bench tops.
BFBOB states that simply in a couple posts up, fixed equipment, bench grinder, drill doctor from the top back and the hand held from the front. There is always an activity area, over or at benches, shelves etc and ideally for me would be surface raceway with some 4 inch boxes where needed. Easy to make a couple changes, as well as a guy can plan things just dont seem to work out, nice to be able to switch a recept, or switch local light, who knows. Power strips may work but nothing says pro like being wired in obvious fashion where it sposed to go.
Yes, 40 is too low.