Thanks for the answer Ondra. didn't know it is actually complicated to add. i really was crossing fingers it was some simple output thingy ..
But please. What you guys are doing for roadmap for 1.7 is, i say again, impressive!. didn't wanna sound ungreateful at all :
The thing is Deep data is now pretty much a cornerstone for the way a renderer plugs into a pipeline. The whole compositing workflow for many studios is now deep comp so not being able to provide them with that gets Corona out of the equation from the get go in many instances. which..well, sucks :( as then there is no chance to play with all those awesome 1.7 features. ( is not just asking for moarr! :).
I personally try to avoid using it due the file size nor i would get the best of it as im not a comper myself. Just pushing you guys to put that one toe at the VFX door. And because i hate supervisors asking "but where is deep channel ..blalbla "! :). you know..dogma is a powerfull thing.
For Ryuu
https://www.fxguide.com/featured/the-art-of-deep-compositing/