Though I congratulate his commitment, one can never predict. You are not the same person, as we all go through experiences. How one feels ten years down the road is difficult to fathom. One can lose the motivation. Jim Courier started sliding in his rankings suddenly and could not even qualify for some tournaments within a couple of years of slipping from top rankings. Ditto Chang, despite his huffing & puffung in the qualifiers, reality stared at his face! His religious belief made him seek a miracle, but God wanted him to look at other alternatives!
Sampras defeated Haas couple of days back and even Federer couple of months ago, but knew he could lose more than any possible wins. Mats Wilander lost the motivation once he won all, except Wimbledon.
Despite Federer's plans, one can never predict what lies in store. But I salute his commitment, maybe a way to motivate himself to stay the course.