European travel adapters

Isn't it frustrating countries still use different sockets. The US/Japan ones are rather flimsy and have a trailing earth wire to connect sometimes. The UK ones are great, with a longer earth pin which "unlocks" the live+neutral pin holes in the socket. The Swiss ones are inconveniently slightly differently spaced round pins compared to France and Germany. The UK shaver 2-pin adapters are also slightly larger round pins which wont fit into standard French sockets!

My "European" travel adapter doesn't fit in Swiss sockets, I need to buy a separate 3 pin adapter for while I am there!

Why don't countries support a multi-compatible socket for the moment? Then in the future just standardise on the safer UK design of plug/socket.