Germany doesn't use ring mains wiring and their housing stock is considerably more modern than the UK's. So they have more reliable insulation and more modern breaker systems.
That's not to say it's not possible here. It is. It's just the UK needs to take a more cautious approach because we have a greater risk of safety issues due to the way our homes are wired and the overall greater age of components.
All this to say, I hope for the roll out soon, but comparing our situation to Germany doesn't help much because our situation is more complex and will likely involve sparkies in a greater way than Germany needs to. Modern homes or those with up to date circuitry may be fine, but Victorian/Georgian homes will likely need somebody to give the place a look over first.