[DeusExMachina]

This is almostr true, but it depends where you live and where you are going.

If your travel stays inside the ring (the highway circling the city), yes, travel time is not that long. Although 15 minutes is optimistic. While I have destinations I usually reach in 10-15 minutes, there are other places that take me 25-30 minutes. Which I don't find worth complaining about anyway, but not everything is 15 minutes away.

Living inside the ring is very expensive though, and many workplaces are outside of it. In that case, biking can take 45 minutes to an hour, or become impractical. I have friends living in neighborhoods from which biking is impractical (Bijlmer, Geuzenfeld).

You can always take public transport, of course, and mix it with biking. But biking through a city with 800.000 inhabitants in 15 minutes is not possible.