Sometimes there are really obvious revisions to parts. For example early E90 N52s got metal thermostat housings. The replacements are all plastic now. So if you pull off the thermostat housing and it’s plastic it’s been replaced at some point. There are more subtle things like that. The N52 again factory aluminum bolts have blue paint but none of the aftermarket replacements are marked blue.

Most people don’t keep track of this stuff and don’t really know as others have said.

It’s the usual for Reddit. If you insult sacred cows the pitchforks come out and something you probably already spent way too much time working on now requires even more time investment to defend. Refusing to respond just means their version of events wins by default.

The weaving and passing on the right are due to the lane discipline. Fix that and much less of the other two occurs.

Ok, but nobody is going learn any of those things in America, end of story.

And, FWIW, I had 30-series tires on one of my cars and never had a problem with expansion joints and I’m just getting started at 80.

You have not experienced just how awful some of the expansion joints can be when your local DOT just doesn’t care. Not unusual to have what is effectively a 4 inch curb on the left lane, hitting it at 80 is bad, hitting it at 120 not expecting it you’re going to have a very bad day. The whole subframe can be tweaked, tie rods bent, the whole nine yards.

State DOTs keeps speed limits low so if you damage your car going faster than the speed limit you have no standing to sue.

I grew up well after the death of US lithography so this was interesting to learn about. Even in specialty manufacturing the US struggled to make any of this stuff work. What’s even more surprising is Canon and Nikon somehow lost ground to ASML in the 193i transition then bailed entirely with EUV. There are no answers, and nothing lasts.

1. Highways are not maintained that well in the US. Doing 80 mph hitting an expansion joint you can easily bend a wheel on modern cars with thin sidewalls.

2. Drivers are awful in the US. No lane discipline, people weave, pass on the right, tailgate, etc. A tiny proportion of people in the US have any experience driving anywhere near the limits of traction.

3. Everyone mentally adds 10+ mph to the speed limit anyways.