I will have to agree that the swiss plugs already are very good. From what I see the only improvement of IEC 60906-1 would be that the plug generally is rated for 16A. Besides that there really isn’t any improvement. The 16A rating is pretty cool for devices like 3KW electric kettles.

Because of how similar the plugs are, switzerland could migrate to IEC 60906-1 pretty easy. Since the polarity of the socket is reversed and the ground pin has a slightly different offset, you could have a dual-socket that has both the neutral and live conductor rated for 16A, and a earth conductor for old swiss plugs at the bottom and the earth plug for new plugs at the top. Because of the slightly different offset of the earth conductor but identical spacing of the neutral and live conductors, both swiss plugs and new IEC-60906-1 plugs would only fit in their correct orientation.

I’m glad.

Maybe it’s unreasonable but I still hope that maybe countries will decide to switch to this connector.

The large amount of different, outdated standards definitly are a safety risk and hassle, even within the EU (e.g. a Schuko Typ F plug can be plugged in in Denmark but then it has no ground connection. Which is a common thing people there do).

So it would be pretty great to have this be the new common connector in all 220V-240V 50 hz countries.

The brazilian plug is sadly a bit different. The biggest changes are that it has a different current rating. There is a version with 10A and 20A. It also allows for pins to completely be made out of metal which is a security hazard.

So it is quite similar but not identical.

I would argue that neither of the plugs shown in the picture nor those mentioned by others are the best.

Ignoring current adoption, I think that IEC 60906-1 is the best plug. It is very similar to the Swiss plug and was intended to, at least in the EU, replace other plugs. It has quite a few advantages over the other plugs. It is rated at 16 A, has a compact form factor, is polarised, and has almost all the common protections except fuses (which are pretty much useless anyway). Currently it only is used in South Africa without major changes to the plug.

Compared to the Schuko (Type F):

• Much smaller. You can fit three plugs in the same space as a single Schuko plug (similar to Swiss triple outlets).
• It takes less force to plug in. Above 2.5A, Schuko plugs require a lot of force to plug in and pull out. To some extent, this is actually good for safety, but I would argue that, in the case of Schuko plugs at least, it’s too much
• It is also easier to plug in without seeing the plug since it isn’t round. Everyone who has tried to plug in a Schuko plug without seeing the holes knows how difficult it is
• It’s polarised/directional. In some very specific cases, there is a security advantage to using a polarised plug, but I think it’s also a hassle to only be able to plug in a plug one direction. It also fits Europlugs (the thin, small plugs with only two pins that are very common in Europe, e.g. on phone chargers)

Compared to (Typ G)):

• Wayyy smaller
• Not a stepping hazard
• Rated for 16A (instead of 13 A)

• No Fuse (Again, pretty unecessary)

Regarding three-phase power, I would argue that Swiss type 15 (10A) and type 25 (16A) plugs are the best. These are really cool because while beeing the same size as Schuko (Typ F) plugs, they can transfer three-phase power (so 11 kW; 230 V / 16A on all three phases). They also fit standard Swiss single-phase and Euro plugs. This makes plugging in large appliances like electric stoves much easier than in other countries.

I would find it quite cool if most countries switched to one common plug, and I think IEC 60906-1 would be best for that. It would also be possible to build hybrid sockets for many common plugs during the transition phase.