Thunderbolt - A Striking History has been updated to version 6.
We've added more comparison of USB4 with Thunderbolt 4.
Interestingly Intel has continued its development of USB with USB4.
Like Thunderbolt 4, USB4 will connect to both Thunderbolt 3 and 4 and is also backwardly compatible with earlier USB-C devices.
Indeed, USB4 is very similar to and fully compatible with Thunderbolt 4, bar a few exceptions but has been completely overshadowed by Thunderbolt 4. With USB4, Intel requires USB-C to have a minimum 20 Gbps of throughput.
It is likely only a matter of time before Intel simply drops the USB name.
To muddy the waters just a little bit more, in October 2021, Apple has released a 140w GaN charger around the newly ratified USB-C PD R3.1. However, this is a standard for power delivery rather than data connectivity.
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