It's actually good to see Elon be more humble and realistic about some goals. In this case, I personally think getting humans to Mars is entirely doable in les

It's actually good to see Elon be more humble and realistic about some goals. In this case, I personally think getting humans to Mars is entirely doable in less than 20 years, and the SpaceX goal of a colony by 2050 is plausible, but probably optimistic. The biggest roadblock is the same it's always been - there's just not much of an economic reason to get humans to Mars, so it's a constant uphill battle.