There are really two things that have to occur in order for a new technology to be affordable to the mass market. One is you need economies of scale. The other is you need to iterate on the design. You need to go through a few versions.
I'm trying to construct a world that maximises the probability that SpaceX continues its mission without me.
There are some important differences between me and Tony Stark, like I have five kids, so I spend more time going to Disneyland than parties.
It's obviously tricky to convert cellulose to a useful biofuel. I think actually the most efficient way to use cellulose is to burn it in a co-generation power plant. That will yield the most energy and that is something you can do today.
I think there are more politicians in favor of electric cars than against. There are still some that are against, and I think the reasoning for that varies depending on the person, but in some cases, they just don't believe in climate change - they think oil will last forever.
It's okay to have your eggs in one basket as long as you control what happens to that basket.