I think Nikon's (and Canon's) hurry up! mirrorless offerings are less about protecting other products in their own lineups and more about trying to put the brakes on Sony now, while they still have a chance at staying in the game.
I am really at a loss as to why Nikon and Canon are considered similarly on this front.
The R is no where near the Z in terms of specs and technological progress.
Yes, the Z is not at the level of the a7rIII on all fronts, but it is superior (or at least equal) in terms of:
- image quality (which remains an important aspect of cameras)
- mount potential (gap similar to the one between F mount and EOS)
- usability/UI/body quality feel
- ruggedness
- EVF (and the gap is significant)
- video specs and video AF
- build quality/manufacturing technology
- adaptability of third party lenses thanks to its much thinner cover glass
- image stabilization
It does fall behind in terms of
- AF speed and usability
- battery life (but its battery life is good enough for most usages)
- shooting speed (but the speed is sufficient for general usage)
- lack of double battery card
The importance of these will vary from person to person, and I do understand that some shooters find the a7rIII to be vastly superior do to eye AF alone (and I would tend to agree), but, at least, how can Nikon be looked at as not being fully in in mirrorless with what they have delivered this time around?
If you try to draw a similar comparison table with the Canon you'll easily see that they are the ones slowing down with close to zero investement compared to what they already had elsewhere. How is the R not mostly a piecing together of an M, a 6DII and a 5DMkIV, none of that, except some aspects of the AF, being close to best in class?
Cheers,
Bernard