> Enough sunlight falls on the Earth in 5 minutes to power the world for a year.
At current levels, and that's the point of the parent comment.
> That's effectively limitless.
It's 0.0000095 or so. Impressive but not limitless. An earth in which all the infalling sunlight was used for power would be a dark place, which would be bad for people and for agriculture. And oxygen production. So actually lot less than that.
Enough sunlight falls on the Earth in 5 minutes to power the world for a year. That's effectively limitless.