Walkability is expensive because density. Walkability = density. And density means that real estate is small and there is a competition to get it. A walkable place just can't be big to stay walkable, and it has to include a lot of things to still be liveable.
A suburbia can cover entire continent easily and stay cheap because land, on the scale needed for private houses, is almost free. It just doesn't work this way with liveable cities that have to be small, and quickly lose attractiveness as you move away from the very core which is normally only a few hundred meters in radius.
European cities look nice for a tourist but people living in "nice" parts of them are living there either because their ancestors bought their apartments pre-WWI, or because of one-off luck, or because they are rich. Vast majority still lives in the outskirts that look a lot more like Soviet Union than "Europe" the way Americans see it.
A suburbia can cover entire continent easily and stay cheap because land, on the scale needed for private houses, is almost free. It just doesn't work this way with liveable cities that have to be small, and quickly lose attractiveness as you move away from the very core which is normally only a few hundred meters in radius.
European cities look nice for a tourist but people living in "nice" parts of them are living there either because their ancestors bought their apartments pre-WWI, or because of one-off luck, or because they are rich. Vast majority still lives in the outskirts that look a lot more like Soviet Union than "Europe" the way Americans see it.
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