Purchasers of enterprise storage have historically dealt with an upgrade cycle that was expensive, disruptive, inherently risky, and time consuming and occurred roughly every three to five years. In 2015, Pure Storage challenged customer preconceptions about the enterprise storage upgrade cycle with the announcement of its Evergreen Storage. And in 2016, the company further enhanced Evergreen Storage with new features that have increased its already extremely high customer experience performance. This IDC white paper assesses the impact Evergreen Storage has had on the enterprise storage industry and discusses the technical, financial, and business implications of the program from a customer point of view.