> Just to mention Belgium's example despite having an eID, you can't even change your address online in most communes and you need to physically present yourself and demand the address to be changed.

I don't see why this should be done online. The registration/change of address requires a proof. Many services like bank accounts, pensions, tv tax etc. are linked to one's registration address. A one time physical presence (or a similar variant) is a reasonable tradeoff between verification and convenience. You create a meaningful hurdle and make people liable for their statements. Convenience is not the only metric to decide what should be done online.