I think it is safe to predict that older IC engined USA vehicles will be repaired and kept running for longer lifetimes.
This is already a trend the past 30 years, and the trend will continue at an increased rate.

Many USA spec “prestige” cars that were in minor accidents that set off the airbags were shipped overseas in containers where lower cost body shop labor fixed damage but not airbags. This was already “a thing” in NC in the 1990s. I would not be surprised to see some of those vehicles re-imported to the USA, but with working airbags.

The newest diesel commercial vehicles are such headaches that there is a trend to take new vacuum trucks, crane trucks, dump trucks, etc
and strip the specialty parts off and install them on an old chassis with a more reliable older emissions spec engine that does not frequently light the CEL and derate power.

Trailer mounted Industrial equipment that used to be ordered new with coupled diesel engines are now being ordered with big HP 440 volt AC motors so that older emissions spec separate diesel generators can power them more reliably.

Much of this equipment is to “repair infrastructure” so these costly work-a-rounds will be paid by taxpayers.

The crazies are making noises to require military equipment to sacrifice reliability for emissions.