Once you have bought the software, you need to install it. Some high-end commercial packages go to extremes in this respect. They provide thousands of parameters that have to be set up appropriately. This can be so complex that it is unpractical without the help of expensive systems integrators. Even though standard software may provide extensive configuration features, it still forces you to adapt your business to the needs of the software, rather than the other way around.
Word processors are a prime example for standard software.
Every new generation of word processors adds new features, if only to keep up with the competition. Often, these features are of little use to most buyers, but still everyone must pay for them. Since standard software is sold in large volumes, the costs of the software alone may even be very low. But there are hidden costs, e.g., the cost involved in training, or in upgrading to more powerful hardware. The latter is often necessary because a new software release is typically much larger and slower than its predecessor.