I have an idea, if you know nothing about DSMs SHUT THE FUCK UP!! Especially CronicBurn, you don't seem to know anything about anything and yet you insist on sharing all your useless and/or incorrect knowledge with everyone.
DSMs will typically run forever if you don't abuse them. I am very satisfied with mine. I have had very few problems for the abuse I have put my car through.
I don't really think there is a major point of failure that all people experience. Most people get different problems from different abusive actions. I didn't break anything but a clutch until I was running 12s. Then I started braking driveline parts, axles and transmission(first one was my fault, and the second wasn't until I was in the 11s). Other than that I have had no major problems.