Features will not save you, they will only enable the benefits that your product already provides. 

Twitter didn't have image upload until year five.

Instagram only allowed square images until six weeks before its 5th birthday.

Apple’s original iPhone had a 2 megapixel camera, the App Store didn’t launch until 13 months after launch, and users couldn’t cut, copy, or paste text until iOS 3.0 was released 25 months after launch.

Your core product must be compelling.