Coordless offer a pleasant versatility in particular when you work with someone else on the same computer or if you use a laptop. I use a cordless one for my laptop and I really don't miss those annoying cables. But cord mice are usually lighter than cordless which need they battery included. Because of this weight difference I prefer good old cordful mice for pure desktop machine.
Additional but lesser arguments again using cord everywhere are than you need to pay the additional circuit plus to recharge and recycle additional battery.
We seem to be abandoning the simple yet true adage of "if it ain't broke don't fix it" lately with a lot of things.
So, until I miss a turn and my car crash into a wall, it's not broken. I don't need to fix my speed.
You can tune a piano, but you can't tuna fish. You can tune a filesystem, but you can't tuna fish. -- from the tunefs(8) man page