I&#x27;ve spent a <i>lot</i> of time working with ggplot2 for making advanced data visualizations. For reference, I wrote a nice tutorial on how ggplot2 can be used to make nice charts easily and effectively: <a href="http:&#x2F;&#x2F;minimaxir.com&#x2F;2015&#x2F;02&#x2F;ggplot-tutorial&#x2F;" rel="nofollow">http:&#x2F;&#x2F;minimaxir.com&#x2F;2015&#x2F;02&#x2F;ggplot-tutorial&#x2F;</a><p>To put the scope of the changes in the 2.0.0 release in perspective, I suspect that the simple tutorial is now broken, let alone the code for my more intricate charts. I&#x27;m not upset about it through, since all the changes, especially breaking ones, are well-reasoned and well-documented. Hadley did a great job of explaining everything.<p>I&#x27;ll have to spend some time diving into ggproto.