One sentence reply - yes, publishers could choose not to publish in the new format (.kfx) - but for the price of worse readability to their general customers.
Hyphenation actually does matter quite a bit (especially in languages that sport a higher average length of words..
).
(Ok, more than one sentence already... *dang*
)
That publishers arent reacting at all to this shift, to me is probably the most astounding thing of all. Those meetings must have been challenging..