Emissions inspections are being sunset in more places. Even where they're alive and well, it's gone from an active check with a tailpipe detector and a dynamometer to just plugging into the ODB-II and a visual inspection for unauthorized emission modifications. maybe a check for smoke in neutral when going from idle to full throttle and back.

Americans don't want their cars inspected, so a new inspection criteria is unlikely. For those subject to mandatory safety inspections, it might already be part of the test.