Music listening has become so atomized and private, with the vast majority of people listening through earbuds and unaware of even what close friends are listening to. Under these modern circumstances, I don't think that any choice of product around music listening serves as a strong social signal any more, except perhaps among a few middle-aged men in a few countries.

Not entirely related to the topic, but there is also this weird thing where if you're not on your social network's choice of music streaming service you'd feel left out. I find it a bit amusing. My friend group are all on Spotify (which I assume most people are) and when someone shares a playlist they share a Spotify link. I selfhost my music, so I have my own scripts to extract the playlist and fetch the songs and add them to my server. But I suspect it would also be a problem for others who might be using a different service like Apple Music or something.

I know someone in my group who moved from Apple Music to Spotify because everyone else was using Spotify and she didn't wanna feel left out.

I also can't really share playlists with them, which is fine since I only listen to the same 1,700 tracks from the 90s or early 2000s anyway.