How can they stop something they never did
https://www.dupont.com/position-statements/pfoa.html says "While we no longer make PFOA..."
The "we no longer" could be referring to "the US" as "we", since they talk about the FDA outlawing it. So DuPont never made PFOA.
"Manufacture" might be used in the chemical industry only refer to creating products. And DuPont was earlier in the supply chain.
Or, even more upstream, DuPont may have made precursor chemicals that other people mixed into the final PFOA.
Maybe they "synthesized" them, not "manufactured"
Maybe they bought them from some other company (which they might happen to own)
Maybe they manufactured PFAs in general, but not the specific chemicals PFOA or PFOS (it's an awfully specific statement, after all)
I suspect that just like the whole BPA in plastic thing - the "___ free" alternatives will not be any better.
They will just be sidestepping the very precise legal definition of the chemical that got them in trouble.
So something that seems like it'd trivially not contain X may actually have X.
If you've got celiac, you may want to avoid sparkling water made in a plant that also bottles wheat beers. Gluten free refers not only to the ingredients, but to the manufacturing facility.
https://celiac.org/main/wp-content/uploads/2017/07/Combined-..., point #6.
> "The gluten-free label represents that the procedures put in place to prevent cross-contact with gluten meet FDA standards."
If they thought they weren't liable then they would have fought this in court.