Well, if you look at my list of companies at the end of the diary, the opposite appears to be true: specialists have to be involved in most key components, and 90-100% of those sub-markets is squared by one or two companies. The receivers are high-quality, high-tech material. While mirrors are cheaper than solar cells, these mirrors are still high-precision mirrors. The requirement on generators is no less stringent than on those in gas-fired power plants. Energy storage using molten salt is a tricky technology; there are just four companies in the world that manufacture pumps for it (from what I read up, one of them did not enter CSP market so far, and two more were involved in pilot projects only).

_{*Lunatic*, n.
One whose delusions are out of fashion.}