It depends on the style of application. For most line of business applications the data on the client side is potentially out of date as soon as it requested, a

It depends on the style of application. For most line of business applications the data on the client side is potentially out of date as soon as it requested, and as a consequence very little can be done on the client side except arrange or rearrange data for display. All requests that make any substantive changes must be sent to a server somewhere anyway and client side data caching is almost useless.