Our energy production grows exponentially. For a type I civilisation, producing that kind of energy would be possible. For a type II it would be trivial. In any case the timescales involved are measured in centuries.
Our energy production grows exponentially. For a type I civilisation, producing that kind of energy would be possible. For a type II it would be trivial. In any case the timescales involved are measured in centuries.
That's mainly because our population roughly grew exponentially lately. That won't continue.
Energy production is not something self-amplifying like a population of rabbits, so there is no fundamental reason why energy production per capita should grow indefinitely.
But sure, how you would turn sunshine into antimatter at astronomical rates might be an interesting problem to think about. But my original point that basically dismissing this as an engineering issue is a bit dishonest still stands.