I understand William’s decision, as I also don’t use every aspect in Roon and until I bought a NUC for Rock, I used Roon like iTunes on my Mac.
There are good tools to get everything tagged fine (Musicbrainz Picard, Yate …). Roon shines with descriptions and linked names/artists, but as there are big holes in the data sources I also have to call Wikipedia very often, when using Roon. And there are tools like Artistinfo for iTunes to get a lot of more data for the current playing track/artist.
The smart playlists are much more flexible/powerful in iTunes than Roon’s focus feature.
Apple Music is not that bad.
It depends on your usage, AirPlay or Airfoil can fit many needs.
iTunes has an EQ and if you want upsampling you can use the cheap tool BitPerfect. (William seems to be a Mac user)
Most consumers don’t hear any differences. I even can’t hear differences between Hires FLAC and a downsampled AAc with 192 kbit/s. I ordered the Dragonfly DAC because of this and I’ve returned it because the only improvement was the bright LED light in my room. Maybe my equipment is not good enough (Abacus C-Box 2 with A-Bass 10 and a Meze 99 Classic headphone), but I don’t want to change my setup. And maybe my ears are to old.
I haven’t finished my tests there as my Setup is MQA ready for some days. But I think it’s not worth the price for me.