Yes, only two companies are really making camera sensors: Sony and Canon
It might be a bit controversial, but I think they should go down to 30mpix. It would change up the line abit and give those wanting slightly less mpix an option. An upgrade for a Z7 III would be to chase the Z8/9 specs which seems like a waste of tech.
That is a very spicey take! If they did that, unless the price was much lower than the Z6iii, then they should just not make another one.
I know its too late to do things like this but I would have Z line arranged differently
Z5 entry level , 20mpx , 2 sd card slots , basic video features
ZF entry level , 24mpx , 2 sd card slots , removed video features
Z6 Enthusiast level , 24mpx , 1 sd card , 1cf express , pro video features
Z7 Enthusiast level , 36mpx , 2 sd card slots , basic video features
Z8 Pro Level , 60mpx , 1 sd card slot , 1 cf express , pro video features
Z9 Pro level , 47mpx , 2 cf express slots , pro video features
This way wouldn’t cannibalized the lineup when a new camera is released.