On 2/ there is a safety point in having the grounding pin on all plugs, and it being longer than the live/neutral: in the socket side, the grounding pin opens u

On 2/ there is a safety point in having the grounding pin on all plugs, and it being longer than the live/neutral: in the socket side, the grounding pin opens up latches that block live/neutral, so kids can’t stick things into them.. I generally would agree it is the best plug standard for safety, but clunky and painful to step on..