...Canon's sensor is a major issue.
And why are people still denying it?
...I (and anyone else) is an idiot for not thinking Canon's sensors are good enough.
Here's the thing...Canon's sensors are good enough. Good enough to produce stunning images. Good enough to produce award-winning images. Good enough be part of the camera system chosen by a majority of photographers worldwide for the past 11 years.
The fact that they aren't good enough for you and a small number of other people certainly doesn't indicate that Canon's sensor is a 'major issue'. The only major issue is your mistaken perception of the severity of a couple stops of low ISO DR in terms of broad impact.
But why fight sooooo hard to make sure Canon stays behind in this regard forever? How is that a good thing? Sure for some it will never make any difference ever, but most have occasionally had some instant one of shot where the exposure came out wrong, with huge DR you can save it and probably most, at least once in a blue moon, have a shot that no matter what you do with what care won't come out as nicely, so even for them at least here and there it would help and there are some decent number who did hit the limitations fairly often and for whom it could make a decent bit of difference. Now sure you can take an infinite number of amazing shots with the Canon where the DR at low ISO makes zero difference, nobody says otherwise, but why fight soooo sooo hard to help insure that Canon never moves forward and all? Surely even you could make use of exmor quality low ISO at least once in a blue moon. Would you rather have that or, for some, bizarre, reason not?
And the way you mock and sometimes knowingly obfuscate, I mean why? To what good end for anyone?
And yeah for some it doesn't make any difference and sure you can simply just shoot the scnes and subjects where it doesn't matter and have fun taking an infinite number of stunning shots as is, but why fight so hard to not increase the chances that some will be able to shoot a much wider variety of subject types or that anyone won't be able to better rescue a shot where they did mess up.
It's clear that Canon won't bother unless they feel tremendous and heated pressure of every sort imaginable.
So let people go on about it and make a huge deal, the worst thing that could happen is canon finally decides to improve sensors and it makes no difference to you at all that they did, it's not like it would hurt you if they went to on sensor ADC.
It maybe not a crazy, insane freaking big deal, but it's pretty clear that Canon won't care unless everybody turns it into a crazy, insane freaking big deal, they won't bother otherwise.
If the 5D4 lacks in DR, I bet they will finally start feeling it even in sales a bit and maybe that and an internet whine fest of the likes never seen before could embarrass them into action. Or maybe not, but give a try and see.