I was in Paris a couple weeks ago and literally everyone delivering things were on cargo e-bikes or e-trikes. Bikes and cars coexisted on roads but there was also a lot of dedicated bike and pedestrian roads too.

There's a lot of places in the world that aren't florida

Yes would need better bike infrastructure before this is reasonable.

I think cars should be prioritised for commercial use. It serves more people like a bus or train does to public transport. In fact a van with more parcels would eliminate more trips from individual homes to the post office by car. That said. Cars shouldn’t be the only option for delivery for sure. Depending on the city and delivery region.