Thank you for the explanation! That's really helpful and makes a lot of sense. Ending a race under caution would be so anticlimactic. Extending it makes more sense. I had always thought that races could end up caution but maybe that's for different leagues like F1 or something.

I know nothing about racing or Nascar. Can someone explain why you would ever need OT in a race? Doesn't the first person across the line just win? The possibility of an exact tie seems improbably low so there must be something I don't understand.