totally agree, QAM does transfer multiple bits in fact in today's world everything from modulation and multiplexing is done digitally using network processors

totally agree, QAM does transfer multiple bits in fact in today's world everything from modulation and multiplexing is done digitally using network processors which actually work with bytes internally, so technically it should be possible to give network bandwidth in bytes but my point is transmission on network or data bus, always happens in "frames" and a frame of length x bits, usually contains y bits of actual data and (x-y) bits that contain parity/redundancy bits. transmission of 1 byte usually never takes exactly 8 bits during transmission, with an additional few bits to ensure correct reception