"I'm sorry...some modern drivetrains are stupid"
While I agree, it is not limited to modern drivetrains. Think of the genius that came up with the idea of plastic derailleurs and plastic brake levers.... or a 23.35mm thread crank arm. Or the Superbe Tech RD, where the cable left the middle of the chain stay at an angle and the body was all enclosed. Or the Shimano FFS.