I don't really understand your argument here. SVG is supported by every modern browser, has strong tool support (Illustrator, Inkscape and any programming language with an XML package) and has very powerful animation capabilities, eg http://mbostock.github.com/d3/ex/
Flash was a great first web vector tool. But vector has been going declarative like SVG and even XAML for Silverlight. Flash/Flex libraries were going this way as well with xml markup. I love JSON, YAML and other more micro messaging/data formats but for vector and paths, xml actually works pretty well. I do wish they also supported more micro formats if possible though as XAML ended up huge. But for source control and partial updates at least xml works better than binary.
SVG? A bunch of xml is not exactly what vector graphics animation needed.