You can get an entire album or discography now. Back then I remember getting random loose mp3s of artists I was interested in, dictated by how many seeds happened to be online. Not sure I would bring that back, but it did make for some deep cuts becoming my favourite songs and not just the well known “hits” from albums.
The most dramatic change is probably how easy it is to hear any of that music in a legit way, and hear it instantly.