Some real cognitive dissonance in this article…
“The PDF Association operates under a strict principle—any new feature must work seamlessly with existing readers” followed by introducing compression as a breaking change in the same paragraph.
All this for brotli… on a read-many format like pdf zstd’s decompression speed is a much better fit.
yup, zstd is better. Overall use zstd for pretty much anything that can benefit from a general purpose compression. It's a beyond excellent library, tool, and an algorithm (set of).
Brotli w/o a custom dictionary is a weird choice to begin with.