Most countries which used to be 2-pin have adapted to 3-pin with safety earth, certainly Germany with 2 round pins and earth contact and USA with two flat pins and round earth pin.

Martin is right. Although the German plugs have two pins, on those that connect to non-double insulated devices etc, the plugs also have two earth connections that engage with sprung connectors in the socket. There is also a central female connector on those plugs that fit the Swiss-style 3 pin sockets. The big difference is that most circuits are radial and not ring and each group of sockets goes back to an MCB on the board (2 double sockets on each in the case of my studio) these are often then distributed across 3 phases. Our apartment is sort of unusual as it has only has a single phase supply, but the studio is 3-phase with the phases split between different circuits to balance the load. It would be quite simple for me to associate the audio system with a phase that is not used for computer equipment and LED lights for example (I should check actually as it might already be) and I could easily swap out the MCB for an 'audiophile' one and change the sockets to Furutech or similar. The cabling is multi-stranded and all cores are insulated, encased in an intumescent sleeve and then an outer PVC insulator / protective layer and are round in cross-section and all connections are push fit and do not come loose over time (unlike some UK screw connections). And, of course, there is no fuse in the plug. You do though need to take not of which is live and neutral for some devices for consistency - for example, the Isotek units I use. It does not affect function, but can affect performance it seems.