Just started listening to Amazon Music and they do offer some good choices imo. I like the '60's and '70's soft rock playlists though often prefer rock and use my smart phones playlists I created years ago...my playlists are better imo lol.

At 71 I'm still riding solo, group rides and racing...in the real world and also on Zwift. I'm currently trying out TrainerRoad as my cycling coach and it isn't too bad. TR offers so many 'workouts'.
I currently race, on Zwift, once per week and generally do well. Recently won the Saturday INOX masters trilogy in the 70+ cat, and there were three of us woohoo, I also placed third in the 60+ and fourth in the 50+ when comparing finish times.

There are still quite a few of us still racing and at a competitive level even in our 70's so huzzah to us for staring the 'grim reaper' in the face and telling him 'not today' and 'try to keep up'...