That's only half correct, if you look at an outlet, live/brown is always the top right hole and neutral/blue is top left.

It only doesn't matter for appliances with the two pin Euronorm connector, because this norm is designed to be 180° point symmetric (double isolation, low current or something like this).

The Swiss 3 pin connector on the other hand requires that one doesn't confuse live and neutral, it could short-circuit the appliance.