> Microsoft, Oracle, Apple, Bloomberg, etc were all started in the late 70's/ early 80's. Their founders are the richest people in the world.
How are they the richest? Per https://www.forbes.com/real-time-billionaires/ Gates is #4, Ellison is #7, and Apple/Bloomberg/etc are lower. Above Gates are the founders of the much later Amazon and Tesla (then there's FB, Google, etc)