The glitch in the system is that many marketers obsess only about the launch. They put their time and money and effort into the first week on sale, and then run to work on the next thing, when in fact, the mass market, those that choose to wait for more than, "it's new!" haven't decided to take the leap yet.
Perversely, marketers look at what typically happens after the launch and say, "it's not worth sticking with this, because stuff that doesn't take off right away rarely does." And the reason? Because it was abandoned by the marketers who introduced it and then ran off to play with the next shiny object. It's self-fulfilling.
Maybe we missed this part on our headlong rush to become photographers that are paid ONLY for the work we are doing at the time...
"The fact is that almost all the profits of the record and book businesses come from the backlist, from Pink Floyd and Dr. Seuss. Apple sold almost all of its iPhones in the months after each launched, not the first day. Because that's what the market wanted. The exception that proves the rule: The Super Bowl only happens once a year, and it's just about the only time that everyone does everything at the same time."