Is that true and if so, how? I was told that Motif would be taking over the old Apple Photobooks designs and by late November 2018 (it's now mid-December), you could convert your photobook project and continue as if nothing happened. I have photobooks i do every year for Christmas - I was halfway done (1/2 way through the year) when I got the word of discontinuation of the service. At this point, I can't even open the project to complete it as a PDF to give to family as a symbol of the book to arrive later.
The Mimeo plugin does work and I'm checking that out. It's harder to use than before and the fonts are different alas.
I used to be such a brand advocate for Apple. Stuff like this is really frustrating. To discontinue a lifestyle product without a plan is just stupid. If Android weren't even worse, I'd leave Apple.