It’s worth noting that the two-wheeler demonstrated in this video is an old-style one with wheels just attached at the box. The Butchers and Bicycles one linked by the grandparent post is one with an actual steering at the front - the box and the bike will lean into a corner, just like a two-wheeler would.
This makes modern 3-wheelers much more agile. They still have certain disadvantages- they’re wide and bulky, you’ll have trouble avoiding potholes etc., but they’re nowhere as bad as those boxes with wheels (tough you can still buy those - their upside is their low price)
Yeah, I've been linked this before in another thread. But somebody there also provided the statistics: even in the "capital of winter biking", about 22% of trips are taken by bike. Which makes bikes a valid alternative, but not a main solution.
See video "The Car-Replacement Bicycle (the bakfiets)"
* https://www.youtube.com/watch?v=rQhzEnWCgHA
* https://en.wikipedia.org/wiki/Cargo_bike#Long_John_bicycle