It’s as Car and Driver said in the subheading of my link in an earlier comment (downvoted as ever): “A three-decibel reduction at 70 mph is unheard of for a facelifted vehicle”.
Same goes for the suspension overhaul. Most cars go their whole life without significant suspension changes, the typical mods being spring rate for weight increase (oh, Teslas get lighter BTW – and they’re much lighter than competitors, one reason for their efficiency).
You write all of that, and you think (and assert), "Look at how much work Tesla has put into improving their vehicles!"
I read all of that, and think, "Just how fucking bad was the design in the first instance that they had that much room to improve?"
When I sold my Model 3, I had a roadworthy inspection done. (This is a mandatory part of any car sale in the state of Victoria, to show that the car is safe and fit to drive on the roads.) The guy who did the inspection commented to me that - and I quote - "The suspension is rather basic." Yes. Yes, it is. Or was. Maybe they did improve it. But seriously: to make such a big reduction in noise, and a big improvement in the suspension, speaks volumes about just how bad the original design was - and it raises serious questions about how bad the current design is in areas that they aren't talking about.
But then, we already have some pretty strong data points, like their move away from steering wheel stalks to capacitive touch buttons
on the steering wheels for things like turn signals, which is a huge user experience fail.