I hate playing the I told you so card... However, on this point, I feel vindicated. The thing that stood out to me early on in Ovechkin's career that folks didn't seem to fully grasp is that he is uniquely built to "not break" (much like his famous quote). People didn't seem to take that into account when projecting his career.
He just has this barrel chested, thick, build that isn't nearly as susceptible to injury. Of course, his world class shot is important, but people kept expecting his body to fail him (as typically happens to world-class athletes).
At some point it will, but he's got inordinate staying power on that point.