Complexity increases over time but it's not for nought. USB, while complicated is a great deal simpler than dealing with a dozen ill documented buses. Additiona

Complexity increases over time but it's not for nought. USB, while complicated is a great deal simpler than dealing with a dozen ill documented buses. Additionally the amount of things you can do with it are much greater than what you could do with ps/2. The table stakes in general for operating systems is much higher which means making a new one from scratch is impractical for most folks but this is true for most things. Implementing a CPU that's competitive with the ones Intel it ARM is very challenging for a college student but I'm not sure I see that as a problem. Projects like RISC-V exist to give you a baseline to start from for CPU design just as Linux does got os design and they give you a fighting chance to compete. That's probably for the best, and starting from scratch, while sometimes useful, isn't really necessary for most.