https://www.abc.net.au/news/science/2023-09-19/how-tonga-pla...
Africa has different problems. Friends had to leave a Morris Minor van in the desert, there were no UK conforming spare parts, if they'd driven a french car or truck almost anything would have worked because metric. That was a few decades ago but they said the landscape was littered with broken cromwell, challenger and other tanks, from the desert campaigns. The rate of rain is low enough these metal hulks last many decades.
One of the solutions proposed there is to set the import duty high enough to fund disposal of (at least) one car.
Some places find ways to take advantage of this, e.g. Canada exports most of it's bean/pulse crop in bags to Asia in containers instead of bulk carriers. Wasn't that long ago we did the same with scrap metal (maybe still do).
Certainly a crusher/cuber helps maximize density, but a torch or other cutting tools can go a long way to save space. And you're mainly paying for weight anyway as the empty is a sunk cost.
The peugeotard way is basically a tradition stretching back to the '60s; for many, it's just an excuse to have an epic road trip. I remember reading about it in the '90s in an excellent Italian book, Vado verso il Capo - 13.000 km attraverso l'Africa (Feltrinelli, 1996) by Sergio Ramazzotti.