Well, I didn't want to have to just to try out AROS. But also because AROS is supposed to support PS2 mice.
Understandable, but as time goes by you are going to have a hard time finding anything but USB accessories.
I stopped using PS/2 keyboards and mice a couple of years ago.
The nice thing is I can swap most of my stuff between systems.
Apples (as long as its not an Apple keyboard), Sun hardware, PCs all with the same expansion.
I even switched my kvm to a usb model.