I’ve thought about this. Funny how Apple gets all the flak when these USB-C-centric changes have already been out in the Windows and Chromebook markets for at least a year. Shouldn’t this be an indication that your USB-A cables/devices, in general, are up for a change?
We went through this with serial cables, with FireWire too, this is a regular cycle and part of being a “tech worker”, changing interfaces and specs are the name of the game.
I don’t see how this is more than a minor inconvenience. You’re not talking about consumers here like with the iPhone 7. The adoption cycles for Pro machines are much, much longer than a consumer phone. You wouldn’t jump into the USB-C ecosystem unless you’re serious about it. Your old, USB-A setup still works, doesn’t it?