Comment by miyoji

That's not really what happens at all. The characters on the show never make the critical discoveries or are responsible for the major breakthroughs, they're competing in markets that they ultimately cannot win in, because while the show is fictional, it also follows real computing history.

(MILD SPOILERS FOLLOW)

For example, in the first season, the characters we follow are not inventing the PC - that has been done already. They're one of many companies making an IBM clone, and they are modestly successful but not remarkably so. At the end of the season, one of the characters sees the Apple Macintosh and realizes that everything he had done was a waste of time (from his perspective, he wanted to change the history of computers, not just make a bundle of cash), he wasn't actually inventing the future, he just thought he was. They also don't really start from being underfunded unknowns in each season - the characters find themselves in new situations based on their past experiences in ways that feel reasonable to real life.