USB4 is not thunderbolt, and there are multiple versions, just like 3.x. Yeah it's just USB3 renamed to 4, with one version supporting thunderbolt 3 tech. They should have just left all the older stuff on USB3.x and kept USB4 for the Thunderbolt 3 like stuff, so stupid. It's not really thunderbolt though, because it is using copper wire, not fiber.
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