There are still tons of cars from the 90's and early 2000's on the road (in particular the '01 Camry), it'll be at least 20-30 years and anyone with a new car being limited is just going to be harassed for driving way too slow relative to traffic.

And even once this is over, I think it's pretty often the speed limits and not the people driving over them that are in the wrong. I don't think slowing everyone down is a useful goal unless we adjust the limits up first.

I agree, but I don't think that would be a good thing.

I suppose if the end result was that speed limits got adjusted up 5-10 mph to match the speed of the road it would be fine. I doubt this would happen in general, and I know it wouldn't happen universally.