The thing that I remember that is very different today is just the general availability of cards. I had been out of the hobby (yes, slowed up not long after Jorday first retired) for a long time and during that period I did buy a few packs of cards but only because a random newsagency had some (I'm talking 1 sighting a year type of thing). I wasn't playing BBall any less, just not seeing any cards.
I only got back into cards because I was looking to see how much my collection had changed price wise, came across this great site called..OCT, which is when I realised the Hobby was alive and well.
So for me, Jordan killed it on retirement. But also the newsagencies and shops where you didn't even see the product helped with it's downturn. I realise it is hard to sell products without a customer base and that with the variety of products that it's almost a Hobby shop only venture anyway, but I have no doubt that if I still saw the product during the period after Jordan, I would have still stayed in touch with the hobby. Even today, AFL and NRL (even Soccor) can be obtained at the local newsagency but BBall is nowhere to be found...only the internet. You had to actively be looking for cards, no chance for a value add buy to kick the interest off.
Was the same or similer downturn seen in the US?