And really we're talking about mass, right? Which is approximated by size

E.g. bicycle vs motorcycle vs Miata vs BMW 8-series vs Suburban vs tractor-trailer

Because that bounds agility, acceleration, and stopping distance, at least to the precision that it would differ in the next 10 seconds.

> at least to the precision that it would differ in the next 10 seconds.

10 seconds? 10 seconds is an eternity.

Some vehicles of similar size might be more than 1/8th of a mile apart in straight line performance in 10 seconds-- let alone the difference once we've got multidimensional vectors.

Exactly. I was thinking the longest span over which an accident could unfold.

My point is-- vehicle dynamics only make a difference in the very short term, because after like a couple of seconds, vehicles can be almost anywhere relative to you even with low performance.

(But, they can be quite different on the timescale of a second).

it only takes 0.2 seconds to turn a motorcyclist into ground beef

If you can't tell apart a bicycle from a 4-cylinder racing bike, let alone a vespa, that's what happnes. And Tesla can't. It also can't read hand signals given by cyclists. It can't tell apart a donkey and a horse.

I've been saying that vehicle dynamics is useful information in the short term. So if you're trying to argue with me, I don't think you've understood my point.

If your goal was to interject an anti-Tesla offtopic comment to the general discussion of vehicle dynamics, it was unwelcome.