Why would we use Wide Gamut Color Space when we have sRGB monitors and export mostly in Jpeg for screen view?

[Pat91]

Hi,

I already answered this question in another old thread before the new wide Gamut was here.

Colour Space question: Which colour space is PhotoLab using as its "working space"?

So the internal color working space of DPL is Adobe RGB. That is, the RAW data are converted to this color space. I will duplicate here the answer I made to Wolf in the thread mentioned above because it’s more adequate to discuss this issue here… I’m really wondering why Prophoto was not chosen instead of Adobe RGB ? Of course, we do know that most output devices are unable to display all the colors of the Prophoto workspace. That’s not the problem. However, computations made in a wider color s…

IMHO, there’s no need to change anything to this answer (beside the fact that DxO Wide Gamut has some advantages over Prophoto). A large working space and 16-bit bit depth provide more accurate computations and avoid artefacts that would appear when using a narrower working space from the beginning. This reasoning applies to any engineering computations : be as accurate as possible all the way down to the final result and only then round it if necessary.

and export mostly in Jpeg for screen view

A general statement that do not apply to any photographer, by far .