It is always interesting to follow the trajectory of thinkers, as in, what they said versus what happened. Elon Musk told LEx Friedman (after thinking for over 30 seconds on camera) that SpaceX would go to Mars in 5 years (from 2023) if all goes well, 10 years tops. Now, within the 5 year horizon, a pivot. Reality kicks in and finds its way to schooling the daring ones. That is not to say we should not be dreaming big and working for those goals. It means we need to retain a pragmatist’s view of the world, grounded to material, physical, and other (human-driven) constraints Having said that, let’s build!.