I really expected a 3rd party company to be producing 3-pronged versions of that adapter. In the UK the ground pin is a requirement as sockets will not fully o

I really expected a 3rd party company to be producing 3-pronged versions of that adapter. In the UK the ground pin is a requirement as sockets will not fully open up the other two before the ground pin is inserted, and Apple's UK adapter has a metal ground pin, BUT still it's not connected to the 3rd internal prong of the charger. The extension cables that you can still buy separately, and that used to come free in 2012-2015 MacBooks have the 3rd prong, hence are grounded. WHY, APPLE?