Just like battery technology has been increasing at a snails pace because the government hasn't mandated its investment.By the time the market changes, it'll be too late.
Oh wait, we have seen an absolute revolution in battery tech from when I was a child thanks to CONSUMER DEMAND for laptops, phones, etc that are smaller, lighter, and with longer running time.
And too late for what? Somebody has watched The Day After Tomorrow one too many times.