Just kidding, but if we draw such sweeping conclusions from the A9II announcement ...
I am struck that Nikon has gone with a new version of its custom 21MP sensor (adding PDAF to the D500 sensor) instead of a probably cheaper, higher pixel count one off the shelf from Sony. For better video? Higher frame rates? Better “per pixel” performance stats in reviews?
They may also have wanted to:
Maintain a coherent level of performance (frames/s,...)?
Lower cost?
Be consistent with the approach they have chosen for FF mirrorless?
Keep some relative appeal for the cameras they will be releasing next?
Nikon’s strategy seems to be define several years ahead and they have always been very careful about minimizing the number of different “part numbers” by reusing tech introduced in higher end cameras later in lower end models.
Cheers,
Bernard