Originally Posted by
AnkleWork
A steel or aluminum frame is one of the cheapest parts of a bike (~$10 to the brand).
In ten years the components will have substantial wear and be somewhat obsolete. Industry economics makes it cheaper to replace the whole bike rather than just the components.
Thus, over focusing on frame durability seems like false economy.
This sounds like the throw away economy to me. I think that there is nothing wrong with considering the lifespan of most important component on a bike, and when consumables have passed their working life span, replacing or upgrading them. A commuting bike is just that, and I'm more than sure that in 10 to 15 years commuting bikes will still do the exact same thing that they do today.