I’ve been an engineer for about two decades now and pretty much everyone I’ve ever worked with has expressed that they would never work for Facebook, betting companies or defense companies.
Amazon is probably next on the shit list and then Google, but each to a much lesser extent than the ones before. Working for Google still holds a level of prestige for some people.
Plex is probably the easiest and most convenient, I think jellyfin is viable too, but I don’t use it.
If you’ve got the money, Roon or Audirvana are the gold standard of self hosted music
If you want something similar, but free, look into things like volumio or subsonic based solutions.