I use it now because I get it for free, but from Spotify the only thing I really miss is the vastly superior multi device support. Being able to have it playing on my computer and I can control it right from the app on my phone, no messing with airplay and it works on non-Apple devices.
But Apple Music works better in general when you’re all-in on the Apple ecosystem. If I was using Windows or Linux again rather than macOS I might switch back to Spotify.