@snacks @lucy @Paradox USB-C is just a port, which you can do just USB 2.0 over, which is much slower than 1000BASE-T and is half-duplex too.

If USB 3.0 is used, accounting for flow control, packet framing and protocol overhead, <450 MB/s of bandwidth is expected, which is somewhat better than the ~125MiB/s 1000BASE-T does, but in reality dodgy cables and the like can reduce speeds to a ¼ of that - so in practice you can only expect speeds similar to 1000BASE-T (USB 3.0 also can interfere with wireless connections like usb devices and Wi-Fi due to the ridiculously frequencies used - while 1000BASE-T at it's quite low frequency does not).