The free market will ignore solutions that can't turn a profit. Any firm that fails to follow this simple maxim won't be in business for long. The corollary to this maxim is that the free market will ignore any solution that cannot be controlled, either through property interests (enforceable intellectual property, monopoly licenses, etc.) or because economies of scale demand centralized operation. This means that free market innovation is structurally incompatible with a huge portion of the universe of possible energy solutions.

from the diaries (with a portion of the text put below the fold). -- Jérôme