You navigated it for 20+ years, so I am sure you will find a way to do so for 20+ more years, or hopefully more!
I personally pay slightly more taxes in Canada than I would owe in US, unfortunately because of that, I don't get to apply to foreign earned income credit, I would love to.
So I don't ever owe taxes to US...........
And I know if you work in say Hong Kong, where the taxes are low, you would owe the balance up to your tax bracket in US to US(Minus the FEIC)
But I can't find any examples like you might be in Thailand
Where there is a tax treaty but you pay less tax in US than you would theoretically owe in Thailand