When talking about Thunderbolt 5 I wish MacRumors would put the necessary asterisk that the 120 Gbps transfer speed is a special use case meant for displays. Thunderbolt 5 is 80/80 bidirectionally (40 Gbps across 4 lanes with two lanes uplink and two lanes downlink). For certain display modes it can switch to 120/40 up/down speeds, converting the third lane from a downlink to an uplink. This is not intended for data transfer.