Choice between SVG and Canvas comes down to a balance between performance and interactivity, IMO. It is very easy to attach events and create interactions with

Choice between SVG and Canvas comes down to a balance between performance and interactivity, IMO. It is very easy to attach events and create interactions with a SVG object -- much harder to do that in Canvas (basically, you have to keep track of everything that was drawn). The flipside is, Canvas it effectively a bitmap, doesn't care what the pixels are, so the complexity is a constant regardless of what is drawn. SVG renderers will start to bog down once there are "too many" elements.