>>2622644not to shit on anyone's parade or pick a side here but you will lose information when you apply changes to colours through curves and hue and sat and anything really when in 8 bit per channel. a lot of it will look fine, until you try to undo your changes after export.
here's a normal black to white gradient. up top is unchanged, then it's curves with one point at 128,64, then it's the gradient with the curves in the previous block but also with another curves with one point at 128,192 to undo it. you can see the banding / loss of information.
talking about losing or preserving information in 8 bit per channel images is silly since it's at best a myth and at worst a lie, you've got better arguments.
