I genuinely don't know anyone who uses Apple Music in London, when I walk around the office at work all I ever see are people with Spotify on their screens, and all my friends use Spotify too. Mind, Spotify had years head start here, I was using it back in like 2011 whereas I think it only launched properly in the US quite recently.
I did try Apple Music back when it first launched but the desktop app was absolute garbage at the time. Given how often I use it at work, that was a complete deal breaker for me. I have no idea if they've improved it since then but, honestly, Spotify works just fine for me on both mobile and desktop and I'm too entrenched to bother leaving now unless Apple Music offered something truly different.
I did try Apple Music back when it first launched but the desktop app was absolute garbage at the time. Given how often I use it at work, that was a complete deal breaker for me. I have no idea if they've improved it since then but, honestly, Spotify works just fine for me on both mobile and desktop and I'm too entrenched to bother leaving now unless Apple Music offered something truly different.