Sad to say, but I think you're going to see more and more of this as time goes on. Just because everything was fine in the past doesn't mean it will continue to be in the future. They keep changing the smog laws and it seems it won't be long before the only things that can pass smog are anything less than 10 yrs old and absolutely bone stock.
Just my opinion mind you.
I've even heard of some aftermarket components that at one point were able to get CARB certified, and were so for a string of years, but suddenly, with no design changes in the part, CARB no longer approves of them.
My tinfoil is probably on too tight, but my suspicion is it's probably the auto mfgs. lobbying the gooberment to make goofy laws so things stay in their favor.
Mantra: The more you learn, the more you realize how little you really know.
Translation: If you think you know it all.....you don't know jack.