[mst]

Current example: Yesterday I had troubles to AF in broad daylight with the D850 - using one of the upper outer focus points and a Tamron 100-400/4.5-6.3. Why? Because I used one of the focus-points which are no cross-types and which are limited to f/5.6! As soon as I zoom back from 400 to 250 mm (and the aperture just switches from f/6 to f/5.6) I can AF perfectly.

Great example, seriously. Personally, I find the Z viewfinders (any EVF, to be honest) extremely annoying in bright daylight or any high contrast scenario, since they give such a weird image. I would personally always rely on focus and recompose and an OVF, for sure. No issues at all with that approach, either, for decades now.

Now, does that prove one of us right or wrong? Certainly not. There is a system that fits your needs and wishes, and there is another one fitting mine. Why does it need an ongoing and never ending battle to prove the other side wrong or inferior?