Traditional access control systems—such as those that require keycards or fobs to gain entry—are becoming more and more obsolete every year. Not only are they significantly less secure than biometric-based systems, but they're also more expensive.
The problem with ID cards and fobs is that they're easily lost, forgotten, or stolen. This creates major security risks by making it possible for unauthorized users to get a hold of them.
Lost keycards and fobs also cost a significant amount of money to constantly replace. A study done on lost student ID cards reveals that 19% of students in the US lose their ID card every year. This leads to a cost of around 83.6 million dollars a year spent on replacing them—a cost that could be completely eliminated with biometrics.