It technically forbids insurance companies from denying coverage to people with pre-existing conditions, but clearly they just realized they can take our money then deny services instead.
Also it threw a bone to the insurance companies by fining anyone not covered by insurance - incentivising new customers to just pay for insurance instead.
So tbh it was indeed a flop imo
APU’s absolutely are usable in flight, and if the plane is ETOPS certified (I don’t know if Jeju is) then they even have to be able to start the APU at cruise altitude after cold soaking for 2+ hours