Thanks for posting. I saw the headline and didn’t find a free version of that new study to review in detail and then forgot about it. they say they tried to replicate the methods of the (previously discussed and IMO flawed and politically biased) Warren study so it’s not surprising they got a similar 2/3 headline figure. The interesting thing as you point out is that the ACA did nothing, and apparently the Medicaid expansion (or not) wasn’t a significant factor either.
In typical form, the site linked above discussing the article, a group advocating for single payer, sees the failure of the ACA to reduce this metric of medical hardship and concludes that they should double down on something that’s not working and go for single payer instead. After all under single payer, you can die waiting in line to pay nothing and then you won’t show up in these bankruptcy statistics - mission accomplished, much in the same way the ACA set out to reduce the number of people without health insurance but not actually to make healthcare more affordable. It too accomplished it’s polticial goals and cost control was not one of them.