Application virtualization is particularly useful for running software that was designed for outdated operating systems on modern systems, which directly applies to the scenario of providing access to a legacy software tool. Migrating workstation OS is not specific to application virtualization and generally involves upgrading or changing the operating system on a physical machine. Reduced hardware dependency refers to the decreased need for specific hardware when using virtual machines, which is a broader concept of virtualization and not the direct benefit sought in this scenario. While increased portability is a feature of virtualization, the scenario specifically highlights the need to use legacy software on modern systems, which is a classic case for application virtualization.