JPEG XL is the first image format in over a decade that has shown real quality improvements for high-frequency images (i.e. sharp edges). JPEG 2000 is competit

JPEG XL is the first image format in over a decade that has shown real quality improvements for high-frequency images (i.e. sharp edges). JPEG 2000 is competitive with all of the video codec I-frame formats I've tried, and you can embed them in PDFs unmodified, so I've not troubled with anything new.