Hibar,
I TRUELY understand what you're saying,was having this thought the other day. If there's not enough interest for a car,naturally it won't be produced for modelers. Unless the interest comes close to the number of cars required for a run,it won't happen.
this is common in all scales,but with O being the smaller market,it hits here even more. So if I,(and others), want particular cars,my only choice is hope I can have them custom decorated which is very expensive. So,if I want more variations of certain cars,example FAMILY LINES,CSX,etc.,I'd better stay in HO,where those variations have been done or are likely to be done.
Just my observation.
Al Hummel