@DLSchichtl @Iron_Lynx of course there are things that can’t be delivered in bicycles and of course this only make sense with enough density.
But density is a goal of urbanism.

The places in the world that currently have success doing bicycle deliveries right now allow night time or off peak van/truck deliveries.
Most deliveries are small packages, especially the deliveries that are time sensitive and so are ideal for cargo bike delivery.
The 2-3 photocopier deliveries a week are done with a van at night.

Let me rephrase it: how big is the market of domestic/household users for 300 kgs of photocopiers? Of course commercial shipments are a class on their own, while household cargo is generally so reliant on a handful of small packages every week or so that you can do that by bakfiets.