There is no way that companies will do favors or something for free ..............for very long, regardless of what they say, now, its slowly slowly catch the monkey.
Nikon often comes from behind ie: mirror less cameras, and lets its competition often test the waters first, they let others spend money on R and D then follow on, its cheaper, they even have admitted this.
They usually follow for good reasons, the Z9 was a perfect example and for us extremely painful and disgraceful as was the initial Z6 Z7, all thrown into the field and developed from there, what a disgraceful unprofessional experience, it took over a year to get the z9 closer to the competition, the Z6-7 series is obsolete based on the Z8 specs.
These new cameras will be more like phones, more regular releases and more expensive with greater obsolescence.
The industry is an alliance, one industry, like 3 major departments but collectively its dominance is in unity. They leapfrog each other not destroy each other.
Certain upgrades in mirror less cameras even possibly some lenses will be in the near future you pay for advancements with upgrades, but not bug fixes.
I strongly believe that the Z9 needs to have some advancement to widen the gap from the Z8...........if its not forthcoming in the current Z9 then that tells me the differentiation will come from a Z9 II already poised for release if and when the Z8 has pipe-lined, why, because the A1 II or R1 is looming..........i feel the Z9II will come sooner than later.
Nikon and Canon feed us bread and water for decades, till Sony became a game changer paving the way forward for others to follow, and others did.
Only an opinion