In a typical 3rd Rail project we have anywhere from 25-75 variations across the run of a diesel. Costs go up for every single variation, sometimes by a lot.
I rest my case. People have to understand there's no such thing as a free lunch!
No there aren't any free lunches but think about all the things that you can purchase for the price of Legacy Engine. A Garden Tractor, 3 generators, 4 chainsaws, a snowblower, 5 widescreen TV's or 3 dishwashers for that money.....and they are all digitally controlled. This illustrates the extremely poor value of a full featured O gauge engine. If you like them buy them but I maintain they are not a very good deal.
I disagree (not because I buy legacy engines and the like, I don't), and I think the perspective is wrong. Items like a garden tractor, a generator, a chainsaw, a snowblower, a tv, etc have their value in what they do, they are utilitarian and are made that way, and are made on a mass scale, they are made to do something, and none of those has much in the way of an emotional component to them (yeah, you yell at the tv, but that is because you are a dimwit like myself that roots for a team run by idiots and poltroons and coached by a buffoon [ny jets fan here]), not because you are angry at the tv set.
The value of a legacy engine is not really in it being utilitarian, it is a pure discretionary purchase that you buy to have fun with, to enjoy the way it looks, to use it, it gives you a thrill, unlike let's say a chainsaw (well, okay, there are certain people in this world who might get a thrill out of them, but I am not going there). I was watching a show on the Velocity channel where this guy had a 1959 Cadillac the place did for him, and it was like 50,000 dollars in parts put it into, and if I heard right, like 2300 hours of labor, which means likely you are talking somewhere well above 200k for that car work....that a)would sell for a fraction of that, even in mint shape and b)that 200k could buy a lot of really nice collector cars, muscle cars or a number of really hot modern muscle cars or even some exotics......but it was worth it to him because he loved the car, had been his dad's, always dreamed of driving it again, etc.....in other words, not a rational decision.
As far as all the items you mention being digitally controlled, I am not sure how that is relevant, my phone camera uses the basic technology a high end DSLR uses these days, but they aren't the same. The digital controls on those items are relatively simple compared to a legacy engine, and a digital tv set is not that complex,it is not customized, it is one of many millions using the same LCD screens, same chip sets, etc, whereas the reality of a legacy engine is it is almost approaching the level of a semi custom build, given how few they make, how much they do, and the level of engineering (almost all custom) they have to do, plus they are pretty much hand built.