Patch management is never going to shield us against zero-day exploits, it is an important part of ensuring that risk is minimized. Patch management systems require that appropriate planning, processes and procedures be installed. The products available in the marketplace appear to have more functionality and flexibility since they were originally introduced, the author says. The issue of paying for patches most often arises when a product is out of the normal support model for the vendor, he says. For larger and more complex organizations, achieving this goal might be difficult, if not near impossible.”]
Source: https://www.csoonline.com/article/2117730/now-patch-this.html