In fairness, what we are playing is TWO manuals of an organ! Those older organs couldn't split the manual, so one would have been dedicated to the lower sound or any auto-accompaniment it was capable of, while our RH played the upper manual doing the solo sound.

Now, of course, one manual does BOTH jobs. And much, much more. In something a tiny fraction of the size and weight. Bottom line is, who in their right mind wants to go back to one of these relics for anything other than nostalgia?