[andrewxdiamond]

Plants require dedicated space that cannot be used for anything else. Plants also require security barriers and other obstructions that take up more space.

You could (potentially) put a full solar array, enough to power your house, on your roof right now, and not take up any additional space.

[sliken]

You could, but you'd need grid access for when the sun goes down, and the variability of sun and wind is one of the leading justifications for nuclear.