Every store? Obviously not. Running cargo trams through major business or industrial districts, though? More plausible, if the will exists.

https://en.m.wikipedia.org/wiki/CarGoTram

Something like that, but as a public service.

Delivery of a full kitchen is not something that makes up the majority of traffic. I don't think anyone is saying you can't use a van for the "last mile" in such edge cases.

Even washing machines can be delivered by cargo bike/trike though.

Have a look at the Netherlands friend. I've seen people towing dishwashers behind their bikes more than once while living there.

You joke, but I have done this. Wheelchair accesible trams are awesome for this. Put appliance on hand truck walk it into the tram. No heavy lifting required like when loading it in a car.

Apparently you didnt read past the headline and dont want to understand the content.. welp, cant help ya there.