I once conducted a raw image experiment in which a raw 6,000x4,000 pixel image having 24,000,000 pixels was saved in a SSD card and read in computer. At 16 bits per pixel the filed would have to exceed 48,000,000 bytes (the excess for file header data). In fact, the Mac reported a file size of a bit over 25,000,000 bytes. Bottom line is the 24 Mp could not have over an 8 bit depth. Where did the other claimed 8 bits go? Is this whole debate a dreamland.
I should have mentioned my camera was the Sony α6300. Different cameras different results as one reply reported.