Agreed- though for MIDI 1.0 Kenton has some helpful boxes that act as a USB MIDI host to DIN MIDI converter.
this protest that we must conserve an over 30 year old standard& never ever update it is a breed of conservativism that makes me shudder. basic USB is available on a vast vast range of micros, including a huge range of under $1 ones. if you do want to use old gear, great, the are options.