The world may not have to keep up with the Kardashians for much longer. As Season 17 came to a close in December, the E! reality series was in crisis: Kourtney, 40, announced she was taking a step back from filming; it was clear Kendall, 24, and Kylie Jenner, 22, had already taken a step back…because they’re hardly ever on; and ratings had sunk to 942,000, when the series at one time raked in 3.3 million viewers. “The show is just about over,” says a source, adding that momager Kris Jenner, 64, is panicking. “They’ll all always be rich, but the fame is very important to Kris. She’d be devastated if it ended.” KUWTK should consider itself lucky, too. Other series — from reality shows to news programs — have…
