I'm not sure selective is the right word, there were just far fewer choices. A typical record store would have O(thousands) of different titles, whereas spotify has over 100 million. Obviously much of that is trash, but it's still a huge difference.
It's also worth noting that a big contributor to the 90s spike was people replacing tapes/records with CDs, which were a far superior medium for most usage. The decline after 2000 was not streaming, since that didn't exist, but the wind-down of the upgrade cycle and the rise of file sharing and 0.99 digital track purchases in lieu of $15-20 album purchases.
I agree with most of that though I probably had access to better record stores than was the norm. And yeah digital purchases were never huge but a lot of that as you say was because people often bought single tracks. In fact if you did want an entire album it often made sense to purchase a CD and rip it.
It's also worth noting that a big contributor to the 90s spike was people replacing tapes/records with CDs, which were a far superior medium for most usage. The decline after 2000 was not streaming, since that didn't exist, but the wind-down of the upgrade cycle and the rise of file sharing and 0.99 digital track purchases in lieu of $15-20 album purchases.