Strong Wind doesn't exist on asteroids and many planets, so I think there will be a long term need. Solar power decreases with the cube root of distance from the sun,so twice the distance is 1/8th the flux
The real reason for fusion was that fission is not a renewable resource. In a few thousand years there will be a fuel problem with fission and we would be forced to switch to fusion if we had a fully nuclear power system.
This might sound like the same attitude that put us in our present climate crisis, but that was on the order of decades to centuries. Thousands of years include such unbelievable potential of technological development that there seems no point in trying to predict the actual challenges we'll face.
That leaves low stakes idle speculation.
Solar decreases as 1/r^2. Cube root? Where did that come from?