In Europe those over the top insane-looking american "trucks" need heavy goods vehicle license, plus even if it's light enough for the regular license, it's still classified as a cargo vehicle which is subject for more tax (either yearly tax or sometimes even road usage tax). People can already buy new "trucks" (even Volkswagen makes one) and import old ones from the US for a long time, but extra tax is not something most want to pay.
In Europe those over the top insane-looking american "trucks" need heavy goods vehicle license, plus even if it's light enough for the regular license, it's still classified as a cargo vehicle which is subject for more tax (either yearly tax or sometimes even road usage tax). People can already buy new "trucks" (even Volkswagen makes one) and import old ones from the US for a long time, but extra tax is not something most want to pay.