I dunno about that. I've used ggplot2 a bit and also seen what our best data guys do in Tableau. It really depends on what you want to do. With Tableau, you drag in a pretty big dataset and then you have a bazillion ways to change the chart, sort, group... etc. The charts that ggplot2 give off just seem aesthetically unpleasing. I'm not saying R doesn't have its place and isn't fantastic/free/open source, but that doesn't make Tableau terrible.