Does current Cycles support to output deep exr?

Support Lighting and Rendering
1

Does current Cycles support to output deep exr?

2

Welcome!

I am not sure if it’s the same, but Blender can export multilayer EXRs. Those contain multiple render passes stored as different layers in the same file. Basically, they are exactly what’s sent to the compositor, but exported as a file.

3

Not yet, unfortunately.

I’m right there with you hoping we get it someday, but for now all you can do is try to boost the feature request posts and pester the developers, I guess.