It’s also reasonable to speculate that a sufficiently advanced species might identify the solution to the problem of energy useage as being population control rather than mega-engineering. Instead of trillions, maybe a hallmark of sufficiently advanced species is orders of magnitude fewer of them. Especially if something like immortality is a goal, then reproduction has to be controlled.
It’s certainly easier than capturing a star’s total output!
It’s certainly easier than capturing a star’s total output!