[solardev]

That seems like it would be a lot of duplication of effort. A vector format that also has its own raster codec (and having to deal with compression, different metadata, etc?). Seems like the worst of both worlds, vs just using Canvas to output programmable rasters. Different implementations/browsers already have enough trouble outputting SVG as it is, making it even more complex/powerful would be counterproductive, I think...

There are also specialist tools for dealing with web raster layers, like in GIS: https://openlayers.org/en/latest/examples/raster.html

This just shouldn't be a job for SVG, IMO.