What is the MAIN reason to use incremental backups?

While backups contribute to resiliency, incremental backups specifically focus on efficiency rather than inherently increasing redundancy or resiliency more than other backup types.

Reducing costs is a potential side effect of reduced storage, but the direct technical driver for incremental backups is minimizing time and resources.

Availability metrics are improved by having *recoverable* backups, but incremental backups' primary benefit is not directly about improving availability itself, but rather the efficiency of the backup *process*.

Incremental backups only copy data blocks that have changed since the last backup (full or incremental), resulting in much smaller backup sets and faster backup windows compared to full or differential backups. This efficiency minimizes the impact on system performance and network bandwidth during backup operations.