[Number 3]

First, no car made in the past meets current safety, emissions or even customer requirements. It's just how technology works. So your 2002 Camaro is not compliant with the current standards for crashworthiness or emissions. The standards progress with technologies ability to deliver.

There are simply technologies and knowledge that didn't exist back then.

Does anyone remember when seat belts were required? Airbags? Not when they were available, but required.

Time marches on as does technology. 5 years is a moon shot for electronics. But even 5 years for emissions and safety are giant steps.