>>4457030
Z8 build is sony style, a central metal part with a two other metal plates for support but mostly plastic
https://nikonrumors.com/2023/07/18/nikon-z8-teardown-and-disassembly.aspx/
the z9, z6ii, z7ii, z6, and z7 all have a single piece of metal. the original z5 was also unibody. (pictured: z7ii, a tank, ive seen ones with 2 million on the shutter and only minor rubber issues)

>>4457051
the z6iii is actually built like the z8
https://nikonrumors.com/2024/07/31/nikon-z6iii-camera-teardown-and-disassembly.aspx/
the z5ii has 3 magnesium plates and a plastic core