I don’t think it has much use for you, if you are happy with running Roon server in Linux or a NAS natively or in a VM.
Because of networking issues, I tested running Roon server natively on CentOS, in a Windows 10 KVM VM, and a MOCK in a KVM VM to compare the connectivity with a Roon remote.
From that I found that the easiest thing from a performance and maintenance standpoint is for me to run Roon server in Linux, either using local storage for the library or an NFS volume (because that is infrastructure that I already run and maintain, with or without Roon).
A ROCK is useful for folks that do not have experience running a server (be it Linux or Windows) in their homes, or ofcourse those that specifically want a ROCK. And a MOCK is not really useful for those that do have that level of expertise, as a MOCK in essence limits you because of its very restrictive (and thus easy to maintain for those that value that) implementation.