Passive Thunderbolt Cables run at speeds of 40Gbp at 0.8m, otherwise they run at half the speed. Active Thunderbolt Cables run at speeds of 40Gbp at 1.8m/3m.

Passive Thunderbolt Cables run at speeds of 40Gbp at 0.8m, otherwise they run at half the speed. Active Thunderbolt Cables run at speeds of 40Gbp at 1.8m/3m. All of Apple's Thunderbolt 4 cables are 40Gbp, the same cannot be said about all of the cables you buy from Amazon. If you feel the need to blame someone? I guess you can blame Intel for the design.