You wonder what the innovation curve looks like when people are interested then can't afford the 20k per year for unix4. Someone probably would have gotten the

You wonder what the innovation curve looks like when people are interested then can't afford the 20k per year for unix4. Someone probably would have gotten there (GUN/hurd is only 20 years away, probably because of many people working on linux instead). A lot of the innovation in tech is a result of tinkering or being able to run on a low cost platform to make the margins pencil out. This wasn't much of an option under the commercial OSs that existed before Linus started.