What fun! When you post on a forum, expect discussion to ensue - unless your topic is simply uninteresting and irrelevant.
I am now officially ancient. I remember when all O Scale had was All Nation and Walthers. Sure, older Lobaugh and Scale Craft was available, but Max Gray didn't hit the market until I was in high school. I used to dream about a string of Budd cars.
Almost anything I can imagine is now available in O Scale - for a price. That, plus if I want something obscure, I know how to make it. Life is good, if somewhat short.