I’ve got one. Look at any country with natural resources. In a place like Norway, they try to ensure their oil wealth is fairly distributed throughout society. In Russia, they don’t even try to achieve fairness, and oligarchs run away with all the oil profits. Where would you rather live?
It was championed as a way to fix all of the problems of our current system and give access to everybody. 9 years in and its a mess. Overrun with fraud and abuse, people were taken off the plans they were content with (after being told "if you like your plan, you can keep your plan") and put on more expensive plans. Deductions and premiums are increasing, lack of options (after being told there would be more options, not less) and now you're going to have even less people insured since employers are already opting to stop offering coverage in order to push their employees to the ACA plans instead.
And now? Now we're being told the only solution is the "medicare for all" option because the ACA is a massive failure.