Really not worth fretting about. You have money, money buys options.
If it does disappear, it's not going to be gone overnight with millions of people suddenly without coverage one morning. You will get months, if not years, of advance notice.
Every time a door closes, another window opens. Something will be there.
This is just such an optimistic take that ignores a lot of realities. It's certainly possible that the ACA does get over turned. Justice Roberts has saved it twice, but might not a 3rd time. (Let's be clear, this current lawsuit is going to end up in front of the Supreme Court.) And if it does get over turned the first thing insurance companies are going to do is drop coverage for those with pre-existing conditions. Those folks just are not profitable. All kinds of stuff like high blood pressure, high cholesterol, diabetes, heart issues, allergies, skin cancer (had a mole removed? fuck right off), or as one previous poster mentioned tourets. It does not take a major health issue to be categorized as having a pre-existing condition that could get you denied coverage. Millions of have people have them, some estimates as high as 100 million. Pretty much anybody 60+ has had something. And if you missed something on your application, you could later be denied coverage despite having paid premiums for years.
Sure, the guaranteed coverage for those with pre-existing conditions is the single most liked aspect of the ACA, but without the mandate which has already been removed, it all falls apart. The ACA is basically a 3 legged stool:
1) Everyone is guaranteed coverage, regardless of health. (And a certain level of coverage, which is one of the reasons ACA is more expensive than prior policies - it covers a lot more).
2) Every has to get coverage. This prevents people from just waiting until they get sick to buy insurance. This enlarges the pool to make #1 possible.
3) Those who can't afford it get subsidies to enable #2.
We've eliminated #2 and you can already see the consequences of this in that many areas have only one provider available and costs have gone up significantly. This makes sense, with a smaller pool and the pool is comprised of fewer younger healthy people, costs will go up. This is causing more people to drop out. Will we get into a death spiral? That remains to be seen, but it certainly seems like it is very possible.
So what happens if either the current court case is upheld and ACA is just outright killed or it goes into a death spiral? Nobody knows. None of the smart people on here really know. The optimistic view is there will be a soft landing and ultimately something better will be done. Medicare for all? A public option for those who are uninsured? True nationalized healthcare? States implementing solutions? Or do we just return to the wild west where insurers insure who they want and everyone else can pound sand?
I predict the latter, at least for a while. The political situation being what it is in this country, it is going to be a while before the side who feels the government should have a role in this is going to have the Presidency, both houses of Congress, and judges who agree. Like probably not until I get to Medicare. The Republicans had majorities + the Presidency for two years and passed no actual replacement legislation after spending 6 years post the passage of ACA doing every thing they could to prevent any improvements and claiming they would would "repeal & replace".
So, much like the original poster, the healthcare situation is probably my biggest FIRE worry. Our backup plans include buying property in Spain or Portugal (500k Euros for a property and you can get a "golden visa" and access to their healthcare system), business investment visas in various countries, or buying a business with enough employees to get some group coverage. Or even alternating getting jobs that get benefits, working for a while and then doing COBRA. I'm almost 52, so if I retire now and take COBRA for 18 months, then DW gets a job for a year and we take COBRA, then I do it, etc, we'd each have to work a couple of years out of the next 13.
We're rich, so we'll be fine, but the healthcare situation in the US is a disaster and believing that magic will happen and everyone will be taken care of is just dreaming. If presented the option to write a check for $500k to have 100% coverage for the rest of our lives, I'd likely do it.