For me, it has always been about the trains, not the technology to run them. In my past lives in HO and On30, simple block control was all I needed to make trains run, so that's all the higher up the control system food chain I wanted to go.
In O gauge 3 rail, mechanical E units have been doing the job for decades, so why bother with anything else? Besides, it's the trains I like to see run. They don't have to be scale, they just need to be clearly identifiable as trains. Another plus for me, older stuff like pre and post war trains tend to be undersized compared to actual O scale trains, but that just means more trains in a given space.
