So, I don't spend a lot of time reading on the mechanics of DSLR's which is probably why I don't know the answer to this question but: one of the advantages of mirrorless cameras over DSLR's is the electronic viewfinder.
Can't Nikon make the viewfinder on their DSLR's electronic as well?
Sent from my SM-N920W8 using Tapatalk
I think that to a certain extent "Live View" can be qualify as an EVF. The problem with EVF in the current cameras is
. They are slower than OVF as the electronics has to refresh the scene at least 20 times a second
. They have more time lag compared to DSLR (even though the DSLR takes some time to shift the mirror physically)
. They consume a lot of battery power. This is especially crucial in extreme cold climates, as well as in the tropical heat. With a modern DSLR 700 shots per battery charge are easy and without VR most bodies top 1000+. With EVF you get barely 300 shots if you are lucky.
With more advance in battery technology, sensor response and cooling EVF/Liveview will catch up, and then we may see the demise of the Mirror box in the DSLR, till then DSLR rules.
OT
With 30+fps 8k video capability just around the corner, users may be satisfied with extracting frames from the video and that will spell the demise of lower MP DSLR.