Purchasers of enterprise storage have historically dealt with an upgrade cycle that was expensive, disruptive, inherently risky, time consuming, and strongly driven by vendors' technology refresh cycles and pricing. In June 2015, Pure Storage challenged customer preconceptions about the enterprise storage upgrade cycle with the introduction of its Evergreen Storage subscription. Evergreen Storage has been tremendously popular with customers and has driven targeted responses from all other major enterprise storage players. Over the years, Pure Storage has continued to enhance Evergreen with broader platform coverage and new features that increase its already extremely high customer satisfaction. In June 2022, Pure expanded Evergreen yet again into a portfolio of subscriptions, renaming the Evergreen Gold subscription to Evergreen//Forever. This White Paper assesses the impact Evergreen has had on the enterprise storage industry and discusses the technical, financial, and business implications of the subscription program from a customer point of view