I only average ~600 miles/month and I would not change it. I love my car. To make it even more insane, 25/32k miles on the car were in the first 6 months.
Halfshafts are beefed up so they will not snap when launching or even roll racing with a bit higher horsepower. More prone to happen on manual launching. Driveshaft + loop, also a safety feature. CB005, lockout kit, helps a lot with wheel hop. One of my favorite mods on the S550's. Diff bushing...
I had my mustang tuned at 500 miles or less. It is now past 32k miles and each time I brought it to the dealer, they never cared or even commented on it..even with a turbo under the hood. I would recommend a true tune/tuner setup and a PMAS CAI.