Denmark appears to be slowly allowing it as well, in june this year it became legal to live in a autocamper without an address. But you do need to then have a c

Denmark appears to be slowly allowing it as well, in june this year it became legal to live in a autocamper without an address. But you do need to then have a contact listed, whom the Department for motor vehicles can contact in your place. This contact needs a permanent address, so it doesn't entirely remove the address requirement.