Agreed. The 5D4 takes nice photos. Again, I'm not disputing that at all.It's fair for you to want those features, but at this point, they're just features. There's nothing innovative about adding a feature that someone else already put into their device. Like, if Apple released a smartphone with curved edges, or Samsung added a notch, or one of them added another camera with a different FL, none of that would be innovative, even though you might want it.
It's much more accurate to say that going into 2019, each camera manufacturer's offerings has distinct differentiators and a feature mix that the others don't. Mirrorless full frame cameras aren't same-y... yet... because the market is youthful. So, buy the one you want for today, or just wait a few years, and like DSLRs have become, they'll all be very similar (and you'll be able to get more for less money). Or don't.
Either way, it's only innovation if it's some new idea.
The 5D4 has a fine sensor, and if someone can't generate award-winning, amazing photographs from it, the problem is behind the viewfinder. Are Sony or Nikon sensors better? In some ways, yes, yet in other ways, it is clearly inferior. But we are at the point where flagship sensors are so good that for most photographers, professional or otherwise, they're all great sensors, and certainly good enough.
I can't speak to video, as I would much rather use a camcorder or smartphone to record video than any camera.
As for the hybrid vs dedicated video camera discussion: it's super convenient and cost effective to use a hybrid system if the features that you need are there. Unfortunately for me, Canon does not currently offer these features on EOS R, but its direct competitors do.