Interesting discussion on EVF vs OVF. I'm still on the fence using both D800E and RX10iii (which has a fairly up-to-date Sony EVF, but perhaps not quite as good as their FF mirrorless).
With the EVF, I find it very difficult to see the more subtle changes from rotating a polarizing filter, for example reducing glare from foliage. Often, I need to remove the POL and rotate it in front of my eye then re-install it. Alternatively, I use the arrow mark lined up to the sun, which will provide 100% polarization, but there are times when I want less, and that's where the EVF fails. Furthermore, with the constantly bright EVF, it's easy to forget I have a POL on the front.
Also with the EVF, I often miss subtle details, especially when working close-up; details I would not have missed with the clarity of an OVF.
On the "bright" side, as someone mentioned previously, I can compose and focus with the EVF when using a strong ND filter.