It bumps the speed and officially supports Displayport and PCIe protocols being tunneled through.
Also, as a tiny nit for seemingly no other reason than to piss us all off, they have decided the “correct” way to write it is “USB4” (no space). This is in contrast to every previous version of USB such as “USB 3” (space).
I replied to that thread.
OP was claiming to be working on a static HTML-serving search engine. They suggested that because it’s just HTML and CSS, and that interested parties can use Inspect Element to read the network requests, that it constituted “open source”.
Commenters then got on his case about not open sourcing the server backend. OP defended that choice saying they didn’t want a competitor taking their code and building a company off of it that would “drive [them] out of business”. Uh-huh. So, proprietary software, then. Bye.