aurender no doubt makes real good stuff, as does innuos, auralic, lumin, red rose, grimm and so on -- roon users can go the nuc/nucleus route with 'a la carte' endpoints such as sonore products, bypassing the expensive all-in-one boxes sold by the 'luxury digital system integrators' named above
each company has worked hard and developed excellent solutions to streaming/digital music management... each of course has also made strategic choices on how to handle the software aspect, and each is wary, to varying degrees, of roon seizing control of the end use customer
i would think given how each company has developed its solutions, each company’s products may favor certain connection protocols, external clocking protocols, and so on... some thus may play better with certain other downstream dacs and how they implement connections ...