Way too much focus on the treadle/left-right pedal options. You get used to what you have in my opinion.
Yes, growing up working with lots of different machines teaches a person to tailor a set of reflexes for each machine.
So different controls were not a problem for those on the land, and still aren't. I could see it being a problem if there were identical machines with different controls, but that would be rare enough to be a warning all by itself.
But that's not to say that we kids didn't notice that everyone liked some control layouts better than others. We all agreed that JD controls were always a pleasure and a favorite. Summer time was harvest time and the days were long. Late at night laying in our cots in the barn we would talk about things like the new machines we had seen and generally wonder about the world. This was back in the 1950s & 60s. We knew about factories of course from pictures in school books, but nobody had ever been to one and we had only a vague idea of how they worked. About the people in them, we knew nothing. In fairness, we agreed that it was apparent that the folks in factories didn't actually know much about farming either.
Regardless of the kind of machine, the best were way ahead of the rest; it wasn't even close. JD was lots better at knowing what people on the land were looking for back then. We could tell that JD must somehow put more & better thought into placing the controls. What we couldn't figure out is why other brands didn't do the same. I think we concluded that it must be ignorance of some kind.
Gleaner/Baldwin was one of the worst. We concluded that in a lot of machines all the controls were awkward because the folks who made then were ignorant. They could hardly help being so, since as far as we ever knew nobody from any company ever asked the people who actually ran the machines how they liked the control layout.
But maybe JD did just that & if so maybe it explained why they were better. Or maybe the JD control person just happened to be an old farmboy of standard shape and size.
Now I haven't looked at control layout in years, and my machines are old enough that they don't count.
In fact, there may be other machines today that are even better than JD. I haven't looked at JD either since about the time they went to plastic fenders.
But I wonder, does JD still have a noticibly better control position layout than the other makes?
rScotty