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So be fair, sometimes (e.g. in the case of scatter plots with many dots) pdf renderers become very slow and/or mess up the rendering. In this case the easiest option is rasterizing it (for performance and consistency of the appearance)

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That is certainly true (and why added a general "embed plot data as bitmap into SVG/PDF" option to https://github.com/Vindaar/ggplotnim that works not only for raster heatmaps). But realistically such plots are often not ideal anyway (too many data points in a plot is often a sign that a different type of plot would be better; typically one that aggregates in some way) and it's just another argument to make the data for plots available as well.

If you have the misfortune of having to use Word for writing manuscripts and/or have scatter plots with a good number of points, SVGs will ruin your day in my experience.

(Yes, I'd much rather use LaTeX)

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