What separated Tiger from the rest of the pack was his strength and distance. He could hit the ball farther than everything else and was stronger than all the other golfers. I went back and was looking at driver distance from Tiger's prime and now. When Tiger was in his prime he was averaging over 300 yards off the tee, but what was striking was the other players on top of the list were long hitters and that was about hit. They weren't the top golfers in the game, they were the longest hitters.
Today all the best golfers in the game are hitting the ball 290+. The best golfers in the game have the raw strength that Woods had. He no longer has that advantage that he once had. He no longer has the advantage of hitting 2+ clubs less into the green, muscling 180 yard 8 irons out of the rough to the green, putting his driver 20 yards ahead of his competition. His power and distance are common place now, couple that with a bad back and a bulky knee and you have a guy who is aging. I see maybe one more major, maybe Augusta where he knows every square inch of that place.