While convenient, the "Switch User" feature has hardware implications. Because the previous user’s session remains active in memory (RAM), the computer must maintain two sets of running applications. On systems with limited memory (8GB or less), having multiple active sessions can lead to system sluggishness, paging (using the hard drive as temporary RAM), and increased battery drain on laptops. Therefore, while convenient for quick transitions, users on lower-end hardware are often advised to fully "Sign Out" when finished to preserve system performance.

This method is useful for seeing who else is currently signed in.

The ability to switch users is critical for system security and privacy. In a shared household or corporate environment, users often require distinct permission levels.