For many, me included, a cargo bicycle is an excellent alternative to cars for everyday use:
(Agree that small cars ought to be preferred over large ones. Perhaps by changing the legal width of the inner city streets so that large cars are restricted to the rural, mountainous areas they were devised for in the first place.)
@albertcardona @helenczerski we use such an bike (electric) for all our shopping, transit, moving etc. The Netherlands, so rather common.
But a (shared, or rental) big car is indispensable next to it. Anything that cannot be moved in our cargo bike, requires at least a van.
So, if anything, i'd say that cargo bikes would replace all "small" (sedan, hatchback, or micro) cars. And that the accidental need for big cars remains just as firm.
@echanda @berkes @albertcardona @helenczerski I don't disagree with any of this, other than bikes can be a mobility aid for some, ie with arthritis, Parkinson's (being the two I'm most aware of).
Segregated, safe routes is a necessity for all.