I recently learned an interesting little fact about Inkscape when looking for an SVG to PNG "converter". First, I knew that, in theory, SVG has a similar complexity to HTML. I didn't know that it is quite difficult to find a high quality standalone-ish (not and appendage of a HTML engine) renderer / engine for the format. Well, Inkscape has one of the most complete around, even implementing some not yet standardized features.

For reference: https://inkscape.org/develop/about-svg/ section "How does Inkscape implement SVG?"