You already know that tuning down this way can give your music a lower, heavier sound. But tuning down this way has a host of other benefits: 1. The lower string tension makes string bends easier 2. It places less stress on your wrists and fingers 3. It makes it easier to play with heavy-gauge strings 4. It makes it easier to play in a band with horns 5. If you're experiencing vocal fatigue and having trouble hitting high notes, it makes it a lot easier