ctighe2353: Sleeper_agent: A let better than it was in the 70s when 20% of the cars on the road were full of rusty holes.

Today, at least for premium cars, all the body panel seams are welded and the entire car is dipped into a big vat for a rust proofing electrically bonded coat followed by two or more dips in paint and a final clear coat. I can't remember the last time I saw rust on a car.

Part that and part people don't keep cars that long anymore.  My parents never owned a car that was less than 10 years old and dad kept them running until the body fell apart which was usually mostly body putty at that point.
My 1st car was older than I was.
The minivan I use when hauling stuff to my businesses or for yard work is 14 years old, has 210k miles, drives amazing (honda) and has a little rust in front of the rear wheel wells.  Bought it 10 years ago used for 15k, 10k cash after a crappy trade in.  14 years 0 car payments and only a couple of cv joints, battery, timing chain, brakes and motor mounts....and had to have the hood repaired because the paint started to come off.  So yes cars still rust if you can find someone driving a car older than 10 or 15 years old like you did in the 80s.
I suspect with cars going up and the chip shortage you will see rust again more often.

asciibaron: The Irresponsible Captain: That's one of many reasons why nearly every modern engine has a PCV system,

i thought the positive crankcase system was to recover combustion blow by gases and misted oil as an emissions control... the roads no longer have the black stain down the middle as a result.