I live in the US and find these discussions of tire ratings largely esoteric.
No one is going 200mph here on public roads. On the track, you use racing tires.
As a product of the '60s "with all the rights and privileges" I know that racing tires had no speed ratings on them.
I also remember in the '70s BFG's being used as racing rain tires.
The current tires are "rated" for certain speeds, not guaranteed for those speeds.
Listening to these debates I get the impression that tire ratings is more of a status symbol then anything else and just a way to charge you more for the same tire.