Yes. I anticipate that the next Farm Bill will close these loop holes that everyone has been using, as that was NOT the intent of the Republican led Congress at the time when they passed it. They were pretty specific about it being for industrial purposes and to open up the avenues of additional research through the FDA. The FDA has said no to these products (well all cannabis derived products except one that was approved by them…) and I expect that in alignment with most of the other cannabis related bills around the country and in Congress this past year that they will remove these things from the marketplace, be specific about it, and the “derived salts” train will end.
One never knows how the politics will land - but there is a pretty large “cannabis lobby” that isn’t interested in “hemp products” competing with them. Combine that with the alcohol, pharma, and tobacco lobbies (aka the prohibitionists because of business) and the save our kids lobbies (you know the classic reefer madness folks…) and who do you have left? A handful of farmers and then mostly off the books and warning letter receiving producers in the states. It sucks and politics always sucks that way.
I’m hopeful there will be no movement - but these bills are already being drafted, we should probably see the first draft in Jan/Feb - and we need to hop on it and start sending in our public comments ASAP so they know we are hear. Otherwise there will be no other voice than those saying to do away with these things.
I have not had success with other liners. Sure they exist - but they are not the most prevalent in the market. Almost all cans in the US (think all your name brands) use a Ball can with a BPA liner. That includes all Coke and all Pepsi products last time I checked which was around 9 months ago. I’m sure some granola mom out there cares about complex plastics in her kids water bottle… but if she’s drinking beer its coming from a BPA can. Or if she’s drinking a seltzer, or almost anything these days.
And its always worth noting that just because its isn’t BPA doesn’t mean its any safer than BPA. They have already found new liners that people are complaining (without any science yet, but still) are worse than BPA or the same. And its also worth noting that there isn’t any conclusive science saying BPA isn’t safe. Its still on the FDA GRAS list and there have been lots of studies on its safety and still haven’t found any reason to stop using it. Especially given that it helps maintain food safety and integrity - and we all know that foodborne illness will kill you regardless of whether or not there is a potential for BPA leeching to cause you harm. 
The FDA is currently in the process of reassessing the science on this (again…) because of a petition from concerned parents. I always find those petitions interesting, since they are not like petitions from scientists with data showing conclusions, but are instead requests for the government to spend the money to do the science. -chuckle-
And, of course,
Almost all of the epoxy liners have some kind of bisphenol component. even its its not specifically BPA. There’s multiple generations of it at this point, whether its the seal joint coating, or the overall matrix, or the second layer. And there’s solid research showing that even when it is being used they are looking at ppb being present and non-detectable amounts food to be leeching. Which is a bit crazy, since there is more than that in our water systems and what not - because manufacturing and dumping and other kinds of pollution. 
Even using BPA you still have to dose with leeching in mind - even if its just leeching during filling (because you will lose some to your filters, tubing, etc.). And you have to control for on-going stability of all your other components as well (buffered pH, etc.).
Indeed - if you go with a BPANI Gen 2, instead of say, a generation 1 epoxy coating, I’m pretty sure you even pass the requirements of California (which has the strictest requirements for this stuff…)
I haven’t found any that can handle the different levels of acidity that I’m rolling with, but then I do sodas mostly. I think sticking with what works is probably the most important to me. I wanted my customers to have a consistent product that was shelf stable. These worked for me.