Is absolute USD return being lower than “actual return” (not sure what that is measured in) an issue if you stay in USD your whole life?
Actual return is for non-US investors having to convert back to say Euros for retirement, after having the dollar weaken, you get less Euros for example
No but your USD return gap should in theory be eaten away by inflation.
Actual return is for non-US investors having to convert back to say Euros for retirement, after having the dollar weaken, you get less Euros for example