The question you raised is the one I have had, too. For users, apparently, there aren’t any sonic benefits.
Roon Nucleus Titan Upgrade Offer
This morning I got an email from Roon that they were offering substantial trade in values for those of us who have Nucleus servers, to upgrade to their new top-of-the-line Nucleus Titan server. So I "pulled the trigger" on upgrading from my Nucleus Plus, which sounds great, USB connected to my PS Audio DAC!