Patents and the fact that these chips are massively complex designs. We are talking architecture on the complexity level of the empire state building, most of which is a blend of proprietary designs developed over decades.
Nobody is saying you can’t do it in your garage, in fact it’s easier than ever to start. Let me know how it goes, look into some of the recent tapeout challenges to get an idea of what you are proposing people just make in a garage.
HobbitFoot@thelemmy.club 3 hours ago
In general, tech is an industry with high fixed costs and low costs per unit sold. That kind of pricing structure tends to limit competition.
Nvidia was founded at a time when outsourcing chip fabrication was common and viable, so all Nvidia had to do was focus on design. After a series of failures and near bankruptcy, Nvidia was finally able to invent the idea of a GPU and sell it to the marketplace.
After that Nvidia bought several companies to round out its patent portfolio and capabilities, remaining a dominant company in an industry it created. The only real competition was with other companies that had previous chip design experience.