DAC stands for download access code, or simply said the code we type in to activate a software with the elicenser.
Nuendo used to have an extra kit to get all of Cubase extras that weren’t included. This version (currently Nuendo 8) has that included. I see Nuendo as the Cubase version with added functionality, some options in the menu I will never use honestly, so if you’re only making music Cubase is a great platform, I used just about every option available there.
As I make a youtube music video every now and then I am very interested in the next Nuendo version which has perhaps (hopefully) added videorendering. That would be the icing on the cake. Especially if one could render to h265 (HEVC) or vp9 (the quality difference compared to older types is noticeable) I will be on cloud nine.