I recently watched a YouTube video by Matt Granger on the new Z9 4.1 firmware update and he made an observation which made me sit-up and take notice!
With the recent 4.1 upgrade adding the new & improved bird subject detection feature, he speculated that Nikon is starting to diverge the two cameras; positioning the Z9 for bird and wildlife photography, and the Z8 more for things like portraiture. For example, he points out that the Z8 has a "Skin softening" feature, which the Z9 does not. He goes on to point out that the Z9 has two CFe card slots (which he implies wildlife photographers would want to have), while the Z8 has a single CFe and an SD card slot.
What also came to mind for me (which he doesn't mention) is that in a recent, previous firmware update, Nikon gave the Z9 the "Auto-Capture" feature, but NOT the Z8.
Could it be that Nikon may leave all of us bird & nature photographers who bought a Z8 in the lurch?
What do you think, and how do you feel about this possibility?
To see Matt's comments, here's the video:
His Z9 vs. Z8 comments are between the 3:02 and 4:18 minute marks.