When saving a scatter plot as SVG or PDF output, every point is described and thus file size increases with every point.
In cases of severe overplotting or large datasets, it might be more space efficient to rasterise such layers and include the rasterised image in the output.
I don't think this should happen automatically, but might be an interesting opt-in for layers.
Aside from that, rasterisation is also a basis for various raster effects like blurs, drop shadows, glows, distortions and whatnot. The latter use case is perhaps a bit more frivolous, but applies to raster output as well.
When saving a scatter plot as SVG or PDF output, every point is described and thus file size increases with every point.
In cases of severe overplotting or large datasets, it might be more space efficient to rasterise such layers and include the rasterised image in the output.
I don't think this should happen automatically, but might be an interesting opt-in for layers.
Aside from that, rasterisation is also a basis for various raster effects like blurs, drop shadows, glows, distortions and whatnot. The latter use case is perhaps a bit more frivolous, but applies to raster output as well.