Yeah, it's a pickle. Raphael supports limited subset of SVG with VML failover compatibility, but export is limited because you have to support two technologies.

Then it gets weirder because RaphaelJS isn't exactly responsive-ready. Takes some work to make graphics just resizable (you can scale with the viewbox, but that's about it.) Recently, I switched to pure SVG (even when programmatically generated) because nested SVG elements provide basically a mechanism for relative/responsive scaling, positioning and such.

The guy who came up with RaphaelJS was ahead of his time, and I believe he got hired by Adobe in part thanks to the project's exposure. The development stopped awhile back, and it shows, which is really sad because I liked how the programming style for Raphael is done.