The main consequence for me has been greater fragmentation, particularly on how I play my music. I never stopped buying CDs, though I haven't bought more than 10-15 a year this century, including for gifts, since the age of services and streaming. I've thought of just sticking with my own 5-6000K track collection, but I did move to Spotify with the trial and subscribed for the .99 per 3-month trial instead of the one-month transition offer we got. And I've gotten used to Spotify, even if it doesn't compare to my Microsoft services. Then again, Groove service didn't compare to my Zune service, especially with my original 10-tracks-included deal!!! THAT was my best-there-ever-was-and-ever-will-be deal, bar NONE.
I appreciate that Spotify has an app for my W10M Lumia 950, Win 7 NUC, Win 10 Surface Pro, and android Sony XZ1 Compact. Spotify works seamlessly across all platforms and devices, BUT the software is not as good as Groove or Zune, AND it does NOT integrate my personal and pass music the way Microsoft software did. I use Amazon's Prime music some, and could definitely compete with its Ultimate, but can't without an app for the 950. So, as long I keep relying on this as my main phone, I'll probably stick with Spotify, although another big limitation is that it doesn't offer a discounted annual rate -not a deal-breaker for me, but a big competitive disadvantage if Amazon Ultimate became an option. One big risk, is that I'd SURELY be buying much more music from Amazon :excited:.
I still use Groove on my 950, and also use VLC on my Sony phone because it plays my WMA lossless, without ads.
As for Spotify's prospects: who knows. But, they are the biggest by far, their 320 kbps streaming is excellent (I've just this month stopped ripping at FLAC and WMA lossless), they now have video offerings, and I've read of rumors that Apple may be considering dropping its download sales -given the first big drops in downloaded music sales since they started, no doubt because of streaming options, and that would probably help Spotify and other streaming services. And here's the latest on part of its financial strategy:
https://www.nytimes.com/2018/02/28/business/media/spotify-ipo.html
In any event, I sleep well knowing that Amazon is a good backup and option. Enjoy the music.