New habits
I bought a CD yesterday.
That didn't used to be news. I used to buy a CD every week, week after week, year after year. It adds up.
Hi-rez streaming changed that habit for me, but it took about a year before the itch (mostly) subsided.
Old habits die hard, and it's entirely possible that your customers are on fumes, buying your old stuff now and then, down from often and on their way to rarely.
You can live on old habits for a while, but the future depends on investing in finding and building some new ones with (and for) your customers. Or your family. Or yourself.
The most powerful insight is that you can do it with intent. You can decide that you want some new habits, and then go get them.