>>4314707One and done doesnt really exist on Nikon. They are hopelessly out of date. Even their top shelf Z9 and Z8 have LESS DYNAMIC RANGE than other full frame cameras (to be fair, so does the R3, but canon doesnt pretend its anything but a specialist camera for journalists like nikon and the z8, and NR is forced in raws to make processing easier)
Your one and dones as of 2024 are:
Sony A7RV
Sony A1
Sony A9II (not counting the a9iii because of its DR issues)
Canon R6II
Canon R5
If you can't afford any of these you are going to be compromising, the only "better" cameras are specialist cameras that are only better at one thing but worse at some others.
These cameras are more or less flawless for what they are. Some compromises are inherent to humanity's current level of technological achievement but cameras are not expected to get much better at things other than FPS without even worse compromises for decades.
Everything else is fatally flawed, like the Z6ii/z7ii having shit autofocus and no pixel shift, crop sensors being a budget cope, xtrans being defective by design, medium format having lol no lenses and making the a7rv look lightning fast, etc etc etc.
The closest it gets to good on any other brand is the Nikon ZF. However Nikon has a fatal flaw - GOOD SMALL CAMERA, NO GOOD SMALL LENSES. 28mm f2.8 - no WR. 40mm f2 - soft, no WR. 26mm f2.8 - noisy slow autofocus. If you like what Nikon offers and MIGHT offer you have to wait and hope for the z6iii/z7iii.