Mmm, no, that is not a correct assumption. I use a Roon Nucleus primarily for ease and convenience and “assuredness” of adequacy for the task of handling a library of about 40k tracks. I do not believe the Nucleus+ improved the SQ over my previous Roon deployments on a Mac mini, an iMac, a NUC, and more than a couple of NAS devices. The SQ, as opposed to performance reliability—my early NAS deployments were on underpowered devices—has been steady. The reliability and simplicity of the Nucleus are quite distinct from the SQ.
But I am unclear on how this is responsive to my previous post. If one’s DAC and Roon Core are on a network, and one is not using Roon DSP, what would be the explanation for a change in SQ for bit-perfect data between 1.7 and 1.8? I’m not saying that you are not hearing it. In what way is the SQ better, and why should that be the case? Note: implicit in the Roon statement is that non-DSP-Roon over network should sound no different.
If it’s connected to your DAC over USB or other non-network connection, I could see that making a difference. If it’s connected via a proper network, how will that make a difference?