Was reading they where changing and adding camera’s and busting any changes made by dropping suspensions, emissions.
It's an interesting question for the future.
Federal emissions laws say no changes. States can aid with enforcement, or, choose not to cooperate vis-a-vis the attorneys general choosing not to exercise any rights to prosecute delegated to their discretion.
Now, if/when states in the blue belt elect to tamp down and discontinue exemptions in the interest of spurring ev adoption? If they change the exemption to a stricter class of antique plate with harsh operating limitations for emissions exemption claiming vehicles? (RI already does this, in reverse, by allowing antique plates to carry no restrictions if you voluntarily pass emissions, but, no penalty if you fail/decline to test.)
Maybe this stuff becomes more valuable at that point. Maybe they reproduce components. Who knows