I don't think most manufacturers understand S gaugers. O gauge cars come in all sorts of sizes and "scales" for lack of a better word. Lionel especially made/makes rolling stock in so many sizes and shapes that it is hard to keep track of.
S gaugers, on the other hand, have almost always had rolling stock that is properly proportioned and in scale.
Lionel put S gauge trucks under some O-27 cars several years ago and the S gauge crowd howled in protest.
K-line thought they could do some S gauge cars by using the dies they already had and applying American Models trucks. The trucks are great, but the cars fall short of the target, IMO.
