This makes no sense. There's a limit to how densely people can live, and I see no reason bicycle infrastructure can't support all of those commuters, even if it

This makes no sense. There's a limit to how densely people can live, and I see no reason bicycle infrastructure can't support all of those commuters, even if it has to be expanded somewhat. We DEFINITELY know roads can't scale enough to handle the cars, but when each person takes up a tiny fraction of the space they take up now in their cars (plus closer following distances due to lower speeds), there's simply no problem. I've commuted in places where there is lots of cycling, for example Munich, and yes, you have 'normal' car-like traffic (sometimes in a row of 10 bicycles and you might have to wait for faster bikes to pass before your chance to pull out to pass) but it's not gridlock like in cars on the streets.