No, if I’m running Dynamo in two regions, AWS1 and AWS2, I need to know which of them is closer from any of the 20 Fly regions, which isn’t possible unless I have the numbers for both. Since AWS1 and 2 are unknown, we need them all.
The question is not which AWS region out of them all is fastest from a given Fly region, its which of the AWS regions you’re using is the fastest.