Doesn't matter, since Nikon doesn't build f1.2 lenses for their system Canon will keep them coming :-p ... no matter if f1.2 with current sensors is really necessary or how many people actually are able to focus them wide open.
...or how much Canon has to secretly push the ISO to compensate for light lost due to the extreme oblique angle of light from an f/1.2 lens, especially since higher sensor pixel density means more push is needed.
No, you're not getting away with that, Neuro!
In an earlier thread, you objected to my saying something like "secretly" about this issue, by retorting that it is explained in some documentation somewhere (I forget the link), and is therefore not a secret.
You can't have it both ways. Stop sitting on the fence. Make your mind up, and stay with it!
Canon 5D3 , 70-200mm f/2.8 L IS II , 24-105mm f/4 L IS , 50mm f/1.4 , 85mm f/1.8 , EF 2x III , Samyang 50mm T/1.3
Canon EOS M3 , EF-M 18-55 f/3.5-6.3 , EVF-DC1
Olympus OM2-SP , 50mm f/1.2 , 55mm f/1.2 , 50mm f/1.4 Silvernose , 135mm f/2.8 , 28mm f/2.8