2 strokes get a pretty bad rap in my opinon as far as longevity. But think of how hard they get pushed, it amazing! If you could turn these rpm's with a four stroke it wouldn't last any longer. Just look at outboard boat motors, they run on the conservative side and last 20+ years pushing a pontoon! I'll agree that four stroke power is getting better, but I'll likely be too old to care by the time they achieve 2 stroke fun! They both have their niche.