Ohh I am sorry I thought you were emphasising the data the charts were measuring rather than the actual types of chart themselves!
If you only mean that we should use only line, bar or pie charts, then I would say that scatter graphs at time have a good use of showing outliers, such as some guy who spends say ten minutes on the site, or visually able to show for example how many people spend ten minutes and how many 3. Communicate in other words much more information than a line, bar or pie chart can at times. I mean, people did not invent these other charts for no reason :)
If you only mean that we should use only line, bar or pie charts, then I would say that scatter graphs at time have a good use of showing outliers, such as some guy who spends say ten minutes on the site, or visually able to show for example how many people spend ten minutes and how many 3. Communicate in other words much more information than a line, bar or pie chart can at times. I mean, people did not invent these other charts for no reason :)