AJAX is not seen as “The New Way to Develop Websites”, but as another weapon to add to your programming arsenal.
AJAX in Action
Chat applications cannot be developed without the use of AJAX. The conversation is refreshed at a regular interval (usually in milliseconds) using AJAX. It is not possible to refresh the whole application every time the user sends a message or the chat history is refreshed. This has been made possible only with the use of AJAX.