Re: The rationale is "[fewer] chargers
Indeed, as anyone who deals with EU standards knows, they can and do change as required to keep up with the times.
Whilst there may well be an element of "designed by committee" about them, I've come to regard them (at least the ones I have to comply with at work) as generally quite well thought out and sensible. Something I really wish I could say the same about for some of the equivalent standards from other parts of the world that I also have to comply with...