So, i'm here with old theme, trying to push shadows and kill noise.
Let's lake some underexposed picture from dpreview:
And open it in ACR:
And then give it +3 on exposure:
You can see some color spots that were not removed from picture? First question - Why?
Then we open same raw file in DPP and do absolutely nothing there. Faithful profile, no sharpness, just +3 on exposure:
Save in tiff and then open in ACR, kill color noise and we are done:
No noise despite we pushed +3