Everyone here is expressing their experiences and opinions. Here are mine:
1. I sold my InnuOS Zenith Mk3 and PhoenixUSB with an Intel NUC10i7 with 32GB RAM and 256 GB M.2 SSD running ROCK. Now my system doesn’t crash Roon, doesn’t crash trying to DSP, is reliable and with super SQ. I saved thousands and am thrilled. My opinion is based on my observations and experiences is that these vendors of expensive Roon core servers are highly overpriced and have a high bar to beat over the SQ and low cost of a NUC running ROCK.
2. I have experienced zero issues with SQ with Roon. I would look at your systems power regeneration or conditioning, your systems EMI and RFI contamination and other factors. I don’t know what Roon Core server you are using now. But you can order all the things you need to make a fanless Roon server from Amazon and try it. Compare your NUC to your old or current server. If you don’t like the NUC, dismantle it and return it for a refund. Easy with no risk.