> There are tons of people and companies currently investing in these things. Yes, there are tons of people and companies currently investing in these things b

> There are tons of people and companies currently investing in these things. Yes, there are tons of people and companies currently investing in these things because earlier government investment proved those things possible. It would be irrational for a private company to invest time and money in something with knightian uncertainty. The private sector is good with scale and incremental improvements. Quite bad with fundamental research.