As long as the US dollar remains the currency for international trade settlements, US debt will not pose a significant problem. However, the Russian-Ukrainian war has severely undermined US dollar hegemony, leading countries rich in commodities and resources to realize that inter-country trade can be conducted without relying on the US dollar.
If the US dollar collapses and is no longer accepted by these countries, US debt will inevitably follow suit. Consequently, the prosperous and comfortable lifestyle enjoyed by the American people will come to an end.