I'm considering ordering a cheapie midi keyboard and, having avoided the scourge of printers, it has the first USB-B connector I've seen in at least a decade
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USB devices are not symmetrical. USB is always a tree, and connections always go from host to device. The two sides are different at the electrical level. Connecting two of the same type is confusing at best and dangerous at worst (two hosts shorts together the 5V supplies).
Type C made certain kinds of negotiation mandatory to solve this (e.g. it is illegal to have a Type C port that supplies power unconditionally, you *must* have a switch that checks the ID pin of whatever is connected first).
