https://en.wikipedia.org/wiki/BFR_(rocket)
Musk is breaking through the barrier that has existed for 60 years: the $10,000+ a pound to put something in orbit.
That will be as revolutionary as the microprocessor.
I was skeptical too until about a year ago when Falcon 9 became really reliable.
And NASA throwing money at their contractors has been much of the problem.
Musk isn’t stupid, nor technically illiterate. Nor is he transparent and honest. He would have the public believe that SpaceX designed and launched all those rockets as a private company without government assistance. Never mind the billions of government dollars he has received over the years.
NASA spent 30 years ignoring rocketry. From 1975 - 2005, the Shuttle program and the Space Station ate up the NASA budget.
The lessons learned from the Space Station will be implemented for decades in the future.
To learn to live and work in space for long periods of time, you have to live and work in space for long periods of time. There is no substitute for experience.