[calcifer]

If "once" is a reasonable time (as defined by the regulation) then yes, I'd be satisfied.

[em3rgent0rdr]

but I doubt the average user will be comfortable with such an experience.

[calcifer]

I doubt the average user needs anything more than "as per EU regulations, your data will be deleted in X days" when they delete their account.

[em3rgent0rdr]

It is not just the deletion when closing your account. It is the keeping track of all the copies that have to be made during regular operation (including packets in temporary buffers, periodic backups, cached version, redundant copies to hedge against data loss) just incase one day the user decides to delete.