Solid axle swaps are fairly common in the USA. I live in San Francisco, arguably one of the handful of cities that are aspiring to be similar to European cities, and I don't have to drive more than an hour to see multiple examples of not just solid axle swapped swapped vehicles (GM trucks, Toyota Tacomas), but of actual FJ Cruisers with solid axle swaps.
It's possible it's because of our Proximity to some prime wheeling areas: 1.5 hours to Hollister, 1 hour to Carnegie (mostly dirt bikes), and only 2.5 hours to the famed Rubicon.
I don't see those Icelandic Trucks or formula off-road cars around here, but that doesn't make them fictional. Even Tamiya putting a Jeep body on a CC-01 chassis is not in the realm of fiction as I have seen a Jeep with a custom IFS setup. If you ask me, the latter is farther from the norm than an FJ Cruiser with a solid front axle swap.