Mass eliminated emissions testing because it was deemed too expensive to keep the systems operating given the relatively few pre-obd2 vehicles that didn’t rust out. They just rely on the OBD2 scan and exempted all pre-obd vehicles.
I don’t see them going back to the sniffer anytime soon given that they recently did away with them and revamped the inspection process to heavily depend on the obd2 scan
Same problem in Georgia. Cars over 25 years old were exempt, and all the emissions facilities are private enterprises. So years ago they stopped maintaining the dynos. I just did my last emissions test on the Mustang last year. It was on the last dyno within 50 miles of me that was still working. I did it 6 months early because the guy who runs the dyno told me that the owner had told him that if anything brakes on it that it wouldn't be fixed, and they would just do OBD2 tests.
Kurt