Maybe you'll even take the back wheel off to have a new tire installed. After a trip down to your local shop, you're back home with an arm load of parts. You grab a wrench to loosen the drain plug only to realize your going to be crawling around on the floor to do anything. It's a problem just finding the drain plug, you can forget about removing the rear tire or any other major work. It's much easier to work on you bike when it is on a lift.
Routine maintenance is a snap.
More extensive modifications and repairs that were impossible to perform before are now possible. Removing either of the wheels is now simple. The bike is level, steady and at least one of the wheels is in the air. You can work like the pro's. One little problem here.