Midi has been good to me.
I'm surprised it's stayed pretty much the same standard all this time.
It should have gone 3d by now, with numbers going from 0-4095 instead of 0-127 still.
It shows the amount of thought and consideration that went into the original spec for it to have got this far without drastic alterations. It looked pretty much like it was about to die the death at the turn of the century but the advent of the modern DAW as we now know it revived it. It looked like everything was going to go direct audio to disk around that time.
Love it or hate it, it still must be considered as one of the biggest and most influential advances in music technology since the piano itself.
Still hugely relevant today yet you could run it usefully on a 64k computer at its outset. That is some pretty clever stuff to have come up with.