lag. It's getting more responsive as tech improves, but it'll never be faster than the speed of light. Unless of course, the sensor does a kind of "always taking pictures" functionality so that it can record images even before your finger presses the shutter button.
Really? Lag? We're talking milliseconds here and isn't shutter lag a far more important factor?
An OVF offers more or less the same image that your eyes are seeing, but I don't see how that helps you take a picture more quickly when there is an inherent lag between when you push the button and when the picture is recorded.
EVF lags despite all the improvements and it's a bit worse in darker scene. Screen door effect. The combination of the two make it feels like viewing in VR. So if I am looking through the EVF for prolong period of time, I get eye strain. And if I'm shooting in situation where there's a lot of panning, motion sickness becomes an issue.
OK. I guess I can understand this even if I don't agree. The refresh rates are very high on most EVFs, but there are obviously some individual thresholds here. Personally, I value the ability to be able to see how the picture will look (including exactly what is in focus, the depth of field, etc.) before I take the photo. Being able to see in the dark doesn't hurt, either.
For the most parts yea it's number of buttons, menus you have to go through to switch functions. Ways to do certain things. I have to use multiple brands of camera and Sony is almost always the most awkward one to use. Also do they write custom EXIF for manual lens info yet? I search my library based on GPS and lens info a lot of time, it becomes difficult if I can't have the camera write focal length and fstop in EXIF.
I can customize every button on my A7RII and haven't personally had any issues. I understand a different system being awkward at first. It was a bit odd coming from Canon, but I quickly got used to it. The A9 has another whole dial system for even more quick access options.
No idea about the custom EXIF for manual lens thing. I have never encountered a scenario where I would want to search using the parameters you outlined. I'm also not a professional photographer, but that seems like a very specific requirement you have, so I understand that using equipment that suits those requirements would be the way to go.