It would make sense for Roon to keep the device for testing of their s/w for future releases, otherwise its impossible to quality control but I am not sure if I would technically call the certification as "free".
The recent Build 610 update, in my system, sounds better but only after I moved the library to local storage instead of NAS. One of the serious drawback of Roon that degrades the sound quality tremendously is its constant accesses to the storage device. With NAS, it creates a churn of network events that is detrimental and this has been proven time over time and also with my move to local storage. There has been several request from many of us to cache/buffer it locally but as usual it has gone into def ears.
From purely bit perfect playback s/w perspective, Roon is heavy weight due to its complexities in handling sophisticated UI management, AI, tracking, etc which are necessary evil for audio and thus needs power hungry CPUs. However, if you are DIY'ing there are ways to tame this beast somewhat partially, like processor isolation, etc.
IMO, Roon should consider an Audiophile version of the s/w with simple UI & less jazzy features, if they genuinely wants to hold onto the audiophile market (which I agree is dimunitive) as many companies (Taiko, PS Audio, etc) has started to realize sound quality issues with Roon and started to develop their own version.