[throwaway132448]

Nothing specific! I learned how to implement USB(-C) because there was some specific hardware I wanted to create. I could see the same thing happening with PCIe in future. With USB its longevity was fairly obvious to me, with PCIe I’m not well informed. Thanks for giving me some acronyms to explore!

[checker659]

As much as I cringe sharing linkedin articles, this particular series of posts are pretty good: https://www.linkedin.com/pulse/pci-express-primer-1-overview...

[logdahl]

I found it here as well in pdf form: https://github.com/wyvernSemi/Articles/blob/main/docs%2Fpcie...