[pawelk]

> I've never given polarization any thought and never had any problems, so I don't buy this being an actually a problem in practice.

In my experience polarization has only became relevant once: when mounting a dedicated socket for a gas furnace. For some reason these don't like the live and neutral being reversed and go into an error mode when that happens.

Other than that, most wall sockets in my house are dual, which means polarization in the top socket is reverse of that at the bottom and it has never caused any issues.