I don't disagree. But for those with vertigo, no EVF, no matter how technologically advanced will ever be able to replace an OVF. Literally I almost throw up when using the X-T1 in certain situations. It is very personal, and I know that my situation is bad, but it fits.
The other thing that bothers me is the constant amp normalisation. You point to a dark area, and the viewfinder brightens up, and then you point the camera to a bright area and it darkens. It is so contrary to the way your eyes naturally see and with constantly changing dynamic range, etc., it is very easy for simpler minds (like mine) to get lost. I need to take a break and look with my eyes. What does a scene actually look like?
Only a piece of glass will show that.
I think that's a little short-sighted. EVF technology is still very much in its infancy, and the year-on-year improvements are significant. I can quite easily envisage time in the near future when EVFs can show plenty high enough dynamic range to satisfy almost anyone. As for the brightning/darkening, you realise your eye does exactly the same thing when you're looking through an optical viewfinder? Even when not looking through a viewfinder, you eye is constantly adapting brightness depending on where you're looking.
The only reason EVFs change brightness at the moment is because they can't output the same dynamic range as the scene input, which again is a solvable technology problem.
As for the vertigo issue, again, I believe that's a solvable problem – take a look at the work the Oculus Rift folks are doing with version 2 of their developer kit. Faster refresh rates, less display smearing, and other clever things. Lots of people are working on the problems, and they will solve them, it's just a matter of time.