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> Sidenote: Thunderbolt cables are special USB-C cables, i.e. the wire between your Mac and the USB-C power brick.

Not exactly - that is only sort-of valid for Thunderbolt 3 and its successor/merger USB-C 4. TB1 and 2 used the Mini DisplayPort connector.

TB3/4 use the USB-C connector, but unlike USB-C, at longer lengths (per standard: 0.5m [1], but there longer passive cables as well, e.g. [2]) are the cable isn't passive or semi-passive (cables supporting USB-C PD for higher currents/voltages contain "marker" chipsets in the plugs) - it's an "active" cable with special transmission/driver circuitry to achieve tolerable signal integrity.

[1] https://en.wikipedia.org/wiki/Thunderbolt_(interface)#Thunde...

[2] https://www.amazon.de/Cable-Matters-Zertifiziertes-Thunderbo...




Pedantic (but important) footnote: it's USB4. It's not USB 4.0, it's not USB-C 4, it's just USB4. https://www.usb.org/usb4




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