How isn't that the case with just about every vehicle on the road? well, Unless you have a smart car.

Adding more cargo space is easy with a trailer. Adding more passenger space isn't. And some permanent cargo space for weekly shopping is easier to justify than cargo space you need twice a year.

Just get a quad cab truck its the best of both worlds.

And where do you keep the trailer? That’s a lost garage spot and many HOAs don’t allow you to leave them parked wherever outside.

Over here in (Western) Europe most people rent a trailer when they need it, unless you are living more rural. If you need it once in a blue moon then renting isn't really an issue. Many places that sell large things, like IKEA, also rent out large vans basically for free if you purchase from them.

Right, but if you’re willing to rent, might as well just rent a truck on demand. At this point you’ve shifted the goal posts to, “why do people buy things and underutilize them instead of renting on demand”?

Why have a guest room when there are hotels you can send visitors to?

Why have a 4 door car that incurs most of its mileage in a commute with 1 or 2 people?

Well, here at least trailers are rented because you can pick up a trailer at the gas station at zero notice. Renting a truck is a little bit different.

Where is "here?" I've never seen trailers available to rent at gas stations.

Here in Sweden they're available at most bigger gas stations.

That's a sensible way to do things. In the U.S. I haven't seen it; maybe that's partly why pickup trucks are more popular here.

New Zealand

I don't think most people have guest rooms on purpose. More often those are the rooms kids lived in before they left home and then the rooms get repurposed.

Mine is actually on the side of the house, behind the trash cans (also forbidden). The HOA hasn’t messed with me because I let the HOA guy borrow it. Utility trailers are very useful.

I guess it depends how often you need to use the bed. If you have to truck around that thing all the time just for those few occasions every year when you need to move large or heavy items you might be better off just renting a van for the day.

People should just do the math and decide for their own particular case if hauling around a huge vehicle with all the disadvantages that come with it (maneuverability, fuel consumption, parking, etc.) actually pays off when they need the capacity, or if they're better off always using the right tool for the job (regular car for most of the needs, rent big one for the rest). YMMV.

> hauling around a huge vehicle

I’ve seen several comments in this thread that conclude that it’s wasteful to have the truck bed when you are not using it. Going one level deeper, to the owner it doesn’t feel wasteful on a day to day basis because you forget it’s back there when you’re not using it. But it’s so handy when you do need it.

Former truck owner myself, I downsized to a car after moving to a more urban setting. It’s often on the weekends that I loathe not having to pickup for various furniture moves, gardening, etc. since I now have to borrow and friend’s or rent one.

It’s wasteful in the sense that you use more fuel to carry around more car. You have a harder time parking and maneuvering in a city, and you generally take up more space than needed. Most people forget that what they do has an impact but this does not remove the impact.

How many times per year would you say you need to move furniture? If you do it 1 day per month but carry around a full truck and the above mentioned disadvantages the other 30 maybe it’s not that bad of a trade off.

Or just hire a van - I do this once a year or so when I need to move a lot of stuff. It's £30 for a day with a small van, £70 for a LWB transit (which is massive), or only £100 for a box van with a tail lift (basically a small lorry).