The decision to support older releases is like any other business decision, it is all about the money and profitability. If the vendor can make money at providing support for older releases, it is good business for the vendor. The decision may be sugar-coated with pronouncements about doing what is good for the customer, but both the vendor and the customers know that the first consideration must be the money.
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is now in the best interest of the vendor to support these older releases. How the costs work and where is the break-even point? The cost has two elements. First, bug fixing and keeping the software compatible with changes in the operating environment (operating system, database, hardware discontinuation, etc.) is a fixed cost that does not vary with the number of customers supported. On the other hand, the majority of hot line support, distributing bug fixes and other similar cost varies with the number