Well, at one point you're going to hit the limit of humans. When aerodynamics, bike mechanics and weight, cycling techniques and strength and other biological

Well, at one point you're going to hit the limit of humans. When aerodynamics, bike mechanics and weight, cycling techniques and strength and other biological factors have all been optimized - there's only so much a human body can do. And the optimizations that can be done, will not necessarily be improved linearly each year - I'd certainly expect this curve to flatten out.