Roon's database is quite a problem due to its size. For my library of 8TB files, Roon database was 50-60 GB. Jriver is a fraction of that, as well as Minimserver. With a Lumïn U1, the best results were with the native app and Minimserver as the front end, I'm putting down to less processing by the Win10 LTSC file server.
Roon has artwork embedded in the database as well as metadata for music which it thought better than what you entered and some work, usually to correct this behaviour was tedious and annoying. Box sets are a drama with Roon, do collectively, with other annoyances, in particular the attitude of management at Roon, was the nail in the coffin, Roon and I divorced.
Not long after , Roon encouraged members to submit artwork to consolidate Roon's metadata, which in some respects short circuited work that Roon was supposed to do in the first place.
I've been Roonless for close to three years, don't miss it at all.