Is SVG Dying?

Alive and kicking. SVG is often requested (or just included) as part of design assets; used for icons/logos/illustrations/charts/diagrams on the web; programmatically generated or manipulated (i.e., animation).. Language ecosystems usually have choices of parsers (less so renderers)..

Not sure what context you're referring to, but SVG is heavily used for displaying scalable logos and charts on the web. It's also heavily used for vector-based graphics and outputs to machines (ex. laser cutting) due to its relative simplicity and openness.

Why would it be dying? If anything, most companies are using it more. I'd like to see a binary format for SVG to make them smaller but keep the scalability.

I don't think so. It's used heavily by D3. There are many useful applications of SVG for rendering on the web.