New Businesses Are Like Children . . .

Children grow very quickly in the first few years of life. 

And then, eventually, that growth slows down.

New businesses (and new shows) . . . are the same.

It's easy to get them to grow during the first few years (or months if you're talking about a show).  The hard part is to continue that growth, long after puberty is over.

Because otherwise, they just get old and die.