New Bluesound's Node 2i

Without researching I notice the node2i has the newer AC wifi standard no idea about anything else. 

There were many Node 2’s for sale in the US over the last couple of weeks. Here's sales worldwide...

https://www.hifishark.com/model/bluesound-node-2

Interesting, I was ready to order a Node 2 via my Amex awards program.  When I checked yesterday the Node 2 was not listed even though it was available in October.  So I’m guessing the new model introduction is why.  Hopefully the new 2i model will be added soon.
The linked review is an all out rave!  

Would it be safe to say that most, if not all the sonic improvements of the Node 2i are coming from it's internal DAC?

"Would it be safe to say that most, if not all the sonic improvements of the Node 2i are coming from it's internal DAC?"

Not according to the specs. Looks like they added/enhanced the support for the Apple products.