Re: Plug cable entry angle
"You mean something like this ? Available for about 5 years now."
No - that doesn't have an earth. Also way too flimsy, and reliant on moving parts for normal usage. Fine for use cases where you need the plug as small as possible.
My Sony phone charger does something very similar for compactness, but the best one I've seen was an old apple design where all 3 prongs folded into the very normal-sized plug body, which also contained the voltage convertor goodies and a USB socket.
It really is amazing when you think back to the huge iron transformers we had to use before high power semiconductors were cheap.