I guess, these things weigh more than 3.5 tons. In Germany that means that you would need a truck driver's license to drive them. That license alone costs 3000-5000€ and you have to pass a medical test every few years to keep it. You also need a digital driver's card which, combined with a digital tachograph permanently stores your speed and your driving times. You'll be treated like a professional truck driver, so you can't drive for more than 9 hours per day, have to have an 11 hour break every night and at least a 45 hour break once a week. In practice that means that you can't use your vehicle after 8pm if you drive to work at 7 in the morning and you can't really use it on the weekend etc.

That's enough of a hassle to deter most of the people from getting such a car so much that I rarely ever see them here.

For delivery vans that's no problem because they have to adhere to these limits anyway, because of workers protection rights.