I have a massive library. I have spent 8 years curating, tagging, and organizing it in a very logical easy to navigate way. But I am open to any interface that will improve the experience. However, I will not conform to Roon..if it is really the intelligent software they say it is it has to conform to my need.
I think Tidal is great, but I have 12 TB of music, and I have no use for it currently.
I was not exactly sure what you mean by it is a problem they are trying to solve...?
I have about 1TB of music, also well curated. The problem is that I lose track of what I really have; especially music that I haven't listed to in a long time or purchased/ripped and never listed to, at all. Couple that with a streaming subscription, which I use to sample new stuff (i.e. try before buy), and it's a problem for *me* that isn't solved well with any hierarchical organization. You might be smarter than I am and don't need help "re-learning" what's in your library.
The really cool feature that I like: automated tagging/organization with cross referencing, based on generally accepted genre-categorization of music (i.e. curated by reviewers - especially well done for classical music). So, you are listening to one artist and can immediately find similar music that you may have forgotten is in your collection. A click/tap and you are there... rinse and repeat. I have spent many hours just bouncing around my own collection and listening to music I haven't heard in years.
Similarly, you can try music you don't have in your library via Tidal, using the same pattern above.
Note that Roon doesn't modify your own audio files - your tags are left alone; any meta data from Roon is stored in a separate database.
Roon isn't perfect - I find the actual playback interaction model not to my taste, but I've kept at it because I value the above part.
And, to be frank, it does sound good, but nothing beats MPD playback from locally stored files (USB drive) on my BDP-1.
Just my opinion, I am not affiliated with Roon.