The wadax server was in 1 of the worst sounding rooms at axpona this year by multiple reviewers. I didn’t believe any of the wadax server review in TAS either.
I went from using iTunes over 15 years ago, then using Pure Music and Audirvana for years, then going the dedicated server route using the Auralic Aries system running Lightning DS and Lumin software on it (superior to Aurender at that time).
The converted back to running Roon on a dedicated server. These servers over the years have ranged from a $50k Linux enterprise server using enterprise ssd technology to using a dedicated M1 Mac. Also tried new release of Audirvana but kept Roon.
The biggest advantage of all this was to get a quality dac that used Ethernet and i2s and place the server in a different room than my dedicated audio room. USB was the main cause of the sq degradation no matter what gimmicks/tweaks I purchased to increase sq.
Overall, I prefer Roon, then Audirvana, then Lightning DS, then Lumin in that order.