Here’s an example of how more isn’t always better. Compare the interactive presentation of retail sales data below to the static version – both from the Wall Street Journal. In my opinion the static version presents the information in a much clearer and usable format. The only thing it’s missing is a chart for “total retail sales”. Regarding the interactive version, I’ve never liked stacked bar charts over time unless they illustrate very clear trends – with this many similar segments I think they are pretty silly (though the ability to drill down does alleviate this a smidgeon).  (related article)