Right now, we have multiple mega-corps involved in streaming. They have huge advantages because they don't need to make a penny directly on their music services. Companies like Tidal, Qobuz, Deezer, etc. all have their challenges to stay in business. Who really knows until they get bought up or go under? I personally don't care about their longevity in my choice right now. I keep Apple Music alongside a lossless option anyway.
I have mentioned my issues with Amazon HD in the past. Namely, that is the lack of bit rate switching "exclusive mode" on my macs (I believe PCs have the same issue), the lack of a remote control so that my iPad can control what is playing without needing the desktop monitor, and the lack of it being built into Audirvana like Tidal and Qobuz. On top of that, their Firetv's play at 48khz. Because of these issues, I don't see it is a viable alternative to lossless/hi rez compared to Qobuz and Tidal when used with Audirvana (which also sends the music to my many DLNA devices). Maybe they will remedy these issues, but I don't see me using their service until these problems are resolved.