Recumbent bicycles are older than the modern "safety" bicycle. They lost in the marketplace on their own merits long before the UCI even existed. They are faster in some scenarios, they are slower in others. They cost more, they weigh more, they break more, they're less agile.
The '30s were not the "dawn of racing." The peak of bicycle racing (and technological progress) was 1880-1917. That would be when the safety bicycle was emerging as the dominant configuration.
Moulton wheels had over 30 years to prove themselves before they were banned in 1996, following the Lugano Charter. They didn't.
I want to reply to another odd piece of your claim. Why are you comparing recumbents to safety bicycles? We're talking about uprights. And so far as I know, recumbent velocipedes are later than upright velocipedes, recumbent pedaled bikes are later than upright pedaled bikes (notably the boneshaker); and recumbent chained bikes are later than upright chained bikes.
And surely you realize that all of your claims (cost, weight, breaking, agility) can be more easily ascribed to the fact that uprights are a huge mass market with enormous R&D funding, and recumbents are a tiny little hobbyist thing. Okay, maybe not agility, that's probably inherent.
I'm pretty sure UCI Rule 49 banning small wheels long preexisted 1996. There's little information on the web, but The Spaceframe Moultons describes the ban existing in at least the 1994 pamphlet (it's on google book search if you want to hunt: chapter 9). And certainly there's lots of stuff on the web claiming a near immediate ban, though with no specific date. Do you have any evidence to the contrary?
Recumbent bicycles are older than the modern "safety" bicycle. They lost in the marketplace on their own merits long before the UCI even existed. They are faster in some scenarios, they are slower in others. They cost more, they weigh more, they break more, they're less agile.
The '30s were not the "dawn of racing." The peak of bicycle racing (and technological progress) was 1880-1917. That would be when the safety bicycle was emerging as the dominant configuration.
Moulton wheels had over 30 years to prove themselves before they were banned in 1996, following the Lugano Charter. They didn't.