I made the switch for a couple of reasons. First, part of the attraction of Roon for me was Roon radio, ie having Roon automatically pick tracks which would go well with what I’d played or chosen. For me it was terrible, with track after track of poor choices, because my music taste was outside what Roon could understand. If your taste in music overlaps more substantially with what’s mainstream-for-Roon (at a guess, ‘audiophile’ men over 50), I’m sure it’s great. But for me it was rubbish, and because of Roon’s obsession with a ‘big data’ approach rather than allowing users to actively shape how such features work, it was unlikely to improve - the equivalent functions of the streaming platforms themselves are far better IME.
It was similar with the written content - the artist bios and album reviews etc. For, I don’t know, David Bowie or Pink Floyd or whatever it’s all probably great. But for more ‘Roon-obscure’ music it was often poor.
And lastly, Roon actually got in the way of listening to Tidal’s own playlists, ie the curated genre-related playlists and the auto-generated ‘my mix’ style playlists. Paying that much money for a service that actually stops you being able to listen to music in certain ways just seemed silly.
I gather others have or had various technical issues with Roon. I never did, really. In technical terms it worked well. It’s just that in qualitative terms it didn’t work well for me. At least not well enough to pay that much money for it.