I was watching a video about frequency separation techniques for skin retouching in Photoshop. The subject is irrelevant, but I mention it because this comes from a decent source and a high-end technique.
First thing I see, the person (a knowledgeable photographer / editor / retoucher who works all the time with Photoshop and has many deep tutorials on his site and on YouTube) transforms his RAW file into 8 bit TIFF files.
RAW files are 12 ~ 14 bits. I'm pretty sure he knows that. Why an 8 bit TIFF? This was a given for him, so I'm puzzled.