Fruit is a commodity, but there's many types of fruit. And when you drill down, there's a tons of types of apples or whatever, but they're pretty much commodities.

Some are more valuable or desirable than others, but if you want fruit and you can't get what you want, you substitute with something else.

Music has a lot more variety than fruit, and some varieties are much more valuable, but still. If you're thinking about a career in music, realistic goals are going to be in education, maybe session musician, live music at entertainment venues (theme parks, cruise ships), maybe symphony; maybe something in support of music like a sound tech at a venue, etc. Being a headlining act is a career, but not a lot of people get to do that.

> You could let your playlist run for years, but you don't and nobody else does either because repetition and familiarity and quality are things people care about musically.

I mean, I typically listen to a specific internet radio station and it feels like they have let their playlists stagnate, but I still listen to it. So I wouldn't say nobody does. They've been down for the last two days though, currently listening to a local radio station with similar tastes (but they're constantly adding new music to their catalog).