Actually I had a Mac mini with the touchpad and the damn thing disconnected three times a day. All my input devices have wires now and the stick out of the right places.
To be clear, I'm not saying that there couldn't possibly be any good reason for wanting to run Linux on a Mac desktop. But desktops are already a niche product for Apple, and people who want to run Linux on Mac desktops are arguably a tiny niche within a niche.