I met him he is very driven and knows well. the use of a roon nuc is not the only issue hereI second that reaction. 5$ USB and Roon nucleus was not fair for Kassandra, especially trying to compete with MSB select and wadax. Robert do (who brought Kassandra) should have brought signature or limited edition of Kassandra for audition, which is more in par with select and wadax.
Roon direct alone has sound issues and while it can be better if proper settings are used it’s a less then optimal example
The usb cable can hurt as well
I think if he brought the flagship it makes things worse in that the issues at hand may not be fixed by most dacs.