Look, I get it. The iPad Pro isn’t cheap (though I argue in my review that it’s good value), so I can see why you’d think it might be good to save $299 by using your old Magic Keyboard with a new Pro.

A freelance writer in Olympia, Washington, Matter is a devotee of Microsoft's ergonomic keyboard, the first variation of which the company started selling almost 30 years ago. She even brought along ...