[_-___________-_]

A printer with a USB-B port can be plugged into a USB-C port. Only the cable needs to change, not the printer. After buying my Macbook with 4 USB-C ports I simply replaced the cables for the various devices, and I almost never need to use any adapter/dongle at all.

[Andrex]

I actually do have a digital piano with Type-B, and use a B-to-C cable as well, no adapter needed.