KeepUserTestingApple

I just finished buying a used wired Mac keyboard (A4213), the classic one with the two usb ports on either side, after buying a Magic keyboard for an M1 Macbook pro and then returning the keyboard.  With its limited ports (2 usbC) the MBP is hard pressed to accommodate third party trackballs or mice without an expensive dongle, adaptor or hub.  I don't understand why Apple makes it this to have a new apple keyboard and a third party trackball or mouse?!  I understand the business model imperative but if you accept that Apple sells all sorts of third party products and supports the extended ecosystem then why do they make it this hard to use them?  I've found using the MBP in an office configuration where I need to plug in lots of standard equipment (printer, better camera, mic, card reader, etc) not a lot of fun.  Urg.