Right-of-way, transmission lines running through expensive real estate, cooling towers heating up rivers, limits to size (you can run out of ground, but you'll

Right-of-way, transmission lines running through expensive real estate, cooling towers heating up rivers, limits to size (you can run out of ground, but you'll never run out of space). And on the ground you get this annoying eclipse phenomenon called 'night'. Takes away half your potential collecting time. Also solar flux is like 9X more dense outside the atmosphere. So it takes far smaller surface to collect the same energy.