I’d be fascinated to hear more from others to discover what the critical change was, especially if Windows 10 is to blame. My Roon Ready dropout problems continued with ethernet and to a lesser extent wireless. I also use Windows 10, an Arris router and Devialet Expert Pro - but a 220.
My current solution is a secondhand USB Regen. This solved the dropuout issue and, despite a great deal of cynicism from some members of the community, improved the sound so much that I am still stopped in my tracks by the quality with every typeof music. The only minor quibble is that I cannot get the convenience of Roon Ready with this set-up.