In Sweden you can technically get by with only a psychical ID. But even now when the number of people that only have a physical ID is low getting things done can be hard. Suddenly switching to physical ID only on asocialt wide basis would be comparable to going from almost exclusively shopping online to in-store cash only.
Given that the EU is encouraging disaster preparedness and handling things like extended power outages I really hope they don't make it impossible to function without a charged phone.
