I realize I mentioned the record pools. But I'm worried about the ability to actual purchase the media going away. Apple is already leaving (left?) that business.
The record pools are nice because having an intro, quick hitter, acapella in/out, etc. make it much easier to mix a faster and dynamic set. Those tools are very difficult for the average DJ to create on their own. And those tools simply aren't available commercially, even if I wish they were.
But as the world moves more towards streaming for consumption, I think there will be far less providers of the actual media because demand is dropping off a cliff.