I don't know, I also feel like 'data hoarding' is something that's been getting more popular in recent years. Maybe because the ephemerality of the internet is starting to show.

It's not the data hoarding that reminds me of the old Internet.

It's one person's curated collection.

It's it being made available for the sake of it.

It's novel, unexpected. a gift.

or maybe AI behemoths are driving demand

Yes, in the old low bandwidth days i participated in some live concert snail-mail CD swap online mailing lists / forums