I'm curious , in the case of Apple Music, since HiFi handles files played via iTunes and Apple Music is now integrated into the iTunes desktop app is there any need for SQ (besides the additional EQ features) or is it still required since it is a streaming source?
Like you I'm kind of split between really liking the Apple interface but also really enjoying the quality of Tidal. I'll need to do some careful comparisons to see if I can justify the extra £10 a month for lossless Tidal since I keep reading that 256AAC - at least in theory - is considered to be an excellent codec at least on a par if not better than 320kbps MP3 and I know that in the past I have found it tough to distinguish between 320 and CD , although at times I've felt like I could and I'm sure some can.
If I feel like I can hear a difference I'll probably hold out for Amarra for Tidal although I worry about Tidal's longevity since, apart from the niche market for lossless, right now it's hard to see them competing long term with Apple Music and Spotify for compressed, especially since they don't offer a free tier to get you through the door.
I'm not sure you can use HiFi for the streaming part. I have the regular Amarra program and I'll test it. But I think you'll need sQ to handle to new Apple Music part.
And as far as Apple offering lossless, there were rumors over a year ago that the iTunes store was going to be offering them. They also though could even be in 24/96K format. They have asked all the record label to provide in 24/96 format, so I think it's all in place.