@fdemello Another way to look at "a piece optimized for audio" is to separate the "ethernet problem" from the "usb problem." This has been examined on the Computer Audiophile forum, concluding that the ethernet-to-usb conversion and usb regeneration is a greater challenge than the host computing engine. On a budget of $5K (or more), there is much to recommend hosting Roon on a high-performance, computer-grade NAS like QNAP, and focusing $$$ on Ethernet-to-USB endpoints that are "optimized for audio."
Check out reviews of SOtM sMS-200ultra, tX-USBultra, SPS-500, sCLK-OCX10. You can add these products incrementally as budget permits, without obsoleting anything. I've had the Sonore microRendu as well-- it offers tremendous value at around $600.