If you’re planning to open a pro commercial post production recording studio with Nuage, and are expecting to make 6 to 7 figures in revenue consistently I would say yes go for it.
I switched from Nuendo 2.x to Cubase long ago and didn’t miss Nuendo. At the time, there were very few differences between the two. I have no experience with later versions.
I would approach it from the opposite direction. What features do you need for your work that Cubase doesn’t offer? If Nuendo offers that functionality, will it be worth the ongoing higher price of upgrades in the future?
Nuendo has unique features which are mainly useful for sound-to-picture and(increasingly) game audio work. For everyday music production there is little-to-nothing to choose between them, Cubase is usually half a development cycle AHEAD of Nuendo.
I slightly prefer the Nuendo look, I hate some of the new features which have appeared in Cubase (and now both platforms) over the past few years, the mixer is CARP. I have licenses for both but haven’t updated Nuendo for a while, may do so with the current promotion with an eye to the future but frankly don’t like what I’m hearing about N8. But then the latest Cubase has issues too…