And if you don't, it quickly becomes someone else's bike. That's just the way the world works now. Given that you need to lug the bike around anyway, your choice is now down to the 26-pound version or the 35+-pound version.

> It would seem foolhardy to lug a crazy-expensive, fragile carbon fiber bike up a stairwell on a regular basis. It would be easy to damage it that way.

Spending $4500 on a bike that would be my daily driver is cheap compared to the car it's displacing.

Not sure where you got your intel about the durability of modern carbon fiber frames, but it would be just fine.

A lot easier to lug my 16lb road carbon bike up and down stairs then a 30lb commuter