I have lived in the USA for nearly 20 years. God I miss the NHS (yes I know it isnt perfect). Some of the astronomical bills I have had you would not believe - and I have insurance!
I am sure that in future - possibly not my lifetime, that if some candidate came up with a healthcare bill that had very broad overall support from both parties it would be a winner. It may over time need tweaking. Even Obamacare (ACA) has an element that not even Trump will repeal - preexisting conditions. Everyone apart from the insurance companies are happy about that. I would love insurance companies to be taken out of the loop completely. I think Obama wanted that but knew it was a step too far.
Trump might say he wouldn't repeal the bit about preexisting conditions, but actions speak louder than words - his 2017 tax bill has led to a supreme court case next month which could rule the whole or parts of the ACA unconstitutional, and assuming it happens in time the appointment of Amy Coney Barrett is thought to increase the chances of that outcome.