The problem lies therein that JBIG2 has a compression factor, that is controlled by people who have an incentive to increase it, where few people know what it a

The problem lies therein that JBIG2 has a compression factor, that is controlled by people who have an incentive to increase it, where few people know what it actually does. And how much testing is really done when is changed? Will the test include text in other scripts, like Chinese or Japanse? It can go wrong in so many ways. Jpeg artifacts on text are ugly but they tend to stand out. You will see artifacts long before the text becomes unreadable or ambiguous, and that is a good thing.