I'm one step ahead of Satya!
I switched from Groove to Spotify about 6 months ago.
To be fair, Groove has a much nicer client. Better UI, cleaner text, more info on bands, faster load time, etc.
Spotify, of the other hand, *still* doesn't look into a directory of my choosing and let me play my own music files stored there (so, err, no, I won't be removing the Groove client just yet).
And Spotify *still* insists that I play everything on shuffle by default.
Spotify is 'usable', but not much better than that.
But Groove insisted that my household of 4 pay for four licenses to get 4 accounts.
Spotify gives me four accounts for the price of 1.5
It's not like Microsoft wasn't told. People have been asking - loudly - for household pricing for years.
A neat bundle with Office 365 home, using the same four accounts, clearly required too much cooperation between duelling departments to ever get off the ground.
Not your finest hour, Microsoft!