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I believe they’re absolutely not street legal in the UK, nor in the EU. Those were never “ridiculous sized trucks” Walhalla to begin with (although I see more Rams than I care to, these days), so there’s roughly zero chance those things will become mainstream here.
Heck, we have rain here, that’s enough of a wankpanzer repellant.
In Dutch, we have the similar “zoals de award is, vertrouwt hij zijn gasten” (roughly “the way the innkeeper is, is how he trusts his guests (to be)”).