this post was submitted on 09 Sep 2024
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Everything defined in the Thunderbolt 3 spec was incorporated into the USB 4 spec, so Thunderbolt 3 and USB 4 should be basically identical. In reality the two standards are enforced by different certification bodies, so some hardware manufacturers can't really market their compliance with one or the other standard until they get that certification. Framework's laptops dealt with that for a while, where they represented that their ports supported certain specs that were basically identical to the USB 4 spec or even the Thunderbolt 4 spec, but couldn't say so until after units had already been shipping.