Again mate, I don't believe it's a blind alley. The fact that capitalists are profiting is simply proof that capitalism still exists. In fact capitalism and technological progress are symbiotic.
So have all renewable technologies plateaued in their development? We've done all we can after a few decades at it? Up until recently it wasn't the benefits now that were driving these technologies, it was the future benefits that required these steps to achieve. These benefits are now being realised. Like it or not they're getting greener and if they haven't already, will likely surpass combustio