It’ll solve a few problems.

Now that the upcoming USB4 spec promises to “adopt the Thunderbolt 3 protocol,” some hope it means an end to our international nightmare of USB confusion. You know, the one where there are:

• Two different connectors: USB-A or USB-C
• Four different active specs: USB 2.0, USB 3.0, and USB 3.1 Gen 1 and Gen 2
• Scarce Thunderbolt 3 support, despite using the same form factor as USB-C
• An upcoming USB 3.2 spec that precedes USB4 and introduces yet more confusion through clumsy rebranding

Yeah. That nightmare.
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https://www.pcworld.com/article/3346142/usb4-what-this-future-standard-means-for-usb-chaos-and-thunderbolt-3.html