Of course Nikon does R&D, but most of the new features and functions they're offering with the Z9 have already been available for a while on other manufacturers' cameras.....
And now they’re implemented really well on Nikon cameras too, so yay!
A lot of early face priority autofocus work was Nikon and probably Canon so nothing springs out of thin air in the depths of Sony Imaging. It’s an iterative industry and each company has fantastic engineers. Sometimes Nikon will be first to something, sometimes Sony or Canon. First literally doesn’t matter except to maybe diehard tribalists. Samsung put out the first foldable smartphone. Apple will be very late to the party if/when they put one out. Will it have mattered that Samsung was first? Not to me, since I am not a Samsung user. While it’s interesting from an engineering perspective if Sony or Canon does something clever first, I don’t use either system so beyond interest and curiosity, it doesn’t matter to me. If Lightroom or DXO come out with something clever that Capture One doesn’t have yet, it doesn’t matter in the grand scheme of things. If enough people clamor for something a manufacturer will likely add the feature, usually with their own take. Fantastic!
Nikon put out one of the “best first” mirrorless systems with Nikon 1 - hybrid AF, 20fps, etc. They didn’t pursue it (openly anyway) past that camera. Even with the Minolta purchase, it was clear to Sony that they were not going to compete with Canon or Nikon in the DSLR space so they took the first leap with full frame mirrorless. But until the A1 (possibly the A9ii), someone with a D4, D5 or D6 was going to have equal or better autofocus performance in a lot of fast moving situations than anything from Sony. Until the A7riv, there wasn’t an effective rival from Sony to something like the d850, in my mind anyway. Point being it’s a small industry, everyone has great stuff. No one is always first and whether they are matters very little. We sometimes think it does (I’m as guilty of that as anyone, I’m human after all), but it doesn’t. It is an “infinite game”.
It’s a beautiful fall day here in Denver with Halloween tomorrow! Time to get outside and stop writing or worrying about the small stuff.