What did Henry Ford do really for cars, the assembly line is all I can think of.
I'd suspect the space industry will slow down drastically again if somehow that man stops putting space as a priority (or at least one of his priorities). Currently I don't think there's any one or company that is able to push the envelope AND still turn an operational profit at the same time. Even Starship program is not. Making it work is the exception, not some inevitable norm as others are making it as. Aka - "just because of government money".
But I was more thinking of fundamental capabilites. We (USA and USSR) have had crewed low-orbit space stations since the 1970s and have been sending astronauts to and from them since then. We sent probes to Mars and Venus and other planets in the 1970s. The Voyagers were launched in 1977. The stuff we're capable of doing today has not really advanced.
By contrast a Falcon 9 costs $0.07 billion per launch. And the entire goal of the Starship is to send that cost down another order of magnitude. Without significant competition + price sensitive market, the only way costs come down is if you have an ideologically motivated player. And it's fortunate that we have exactly that with SpaceX.
[1] - https://en.wikipedia.org/wiki/Criticism_of_the_Space_Shuttle...
It goes up and up with every aerospace company doing government contracting.
COTS paid for vehicle development for Falcon-9 and Dragon; CRS paid for flights. COTS was a pretty well-managed program with a lot of clear milestones for funding release.
The troubled Artemis program has paid for a whole lot of Starship development and demonstration. It's questionable how well Starship actually meets Artemis needs, so this is more troubling.
And, of course, the government has bought early flights with no guarantee of success, including just to fly masses/demosats. DARPA/NASA/ORS paid for the first 3 Falcon I failures.