Why is file deallocation important and what would happen if it didn't occur on a regular basis?

File deallocation is important because it frees up system resources, preventing memory leaks and ensuring efficient storage management. Without regular deallocation, the system could become cluttered with orphaned files and unused data, leading to decreased performance, increased storage costs, and potential crashes as available memory becomes exhausted. Additionally, this can hinder the ability to create new files or applications, ultimately affecting overall system functionality and user experience.