Outlook 2003 Cached Mode Vs No Cache

Does anyone have a answer to why one would use outlook 2003 with caching disabled in a large org where there are a lot of laptop users who move around? Surely cached mode would be better for them so that they could still have access to calenda’s, tasks email, etc rather than setting up offline folders in outlook 2003? And for network bandwidth, cached mode is lighter, especially if you have a 100 users connecting a the exchange server. or am i missing something here? is there a scenario where you wouldnt want to use cached mode?