Most Santa Fe F7s - including all freight from about 1954 to their junking in Texas - bore the Blue with a yellow cigar band - which has only been accurately done once (3rd rail is releasing a second in May). The bookend paint showed up in the mid-60s on non-F models and the Yellowbonnet over Blue didn't arrive until 1972. That's a period of nearly 20 years that no one has done accurately for one of the four largest roads (which unfortunately, it also happens to be my favorite color scheme). The Warbonnet at least is sorta kinda accurate on many F3 and F7 models - minus the side panels - and many manufactures have done a Yellowbonnet - which were hardly seen outside of Texas or Topeka. So why no cigarband?
Secondly, some scale options are available - at a price. Because of that, Gen X and Millennials interested in O scale or O gauge trains done to scale dimensions or at least having scale attributes don't have a good entry point into the hobby.
But never fear, I'm in it for the long haul. I'm building a 36' x 22' conventional O gauge layout in my basement.