Any chance a version would be built for use with TrueNAS?

For those that have TrueNAS running this would be optimal. Especially given ambient resources that would be available for consumption by Roon.

Best way to run Roon on a NAS is in a VM. Then you are isolated from NAS OS update issues (cf. DSM6->DSM7). Let the VM house the Roon database, and use a mount back to TrueNAS to target Roon backups to. If you have local music, you can also use a (ideally read-only) mount back to TrueNAS for that as well.