Yeah, if it doesn't come in "little black book" format I'll be extremely grumpy.
Although the LBBs have a nostalgic charm, they really leave much to be desired as a book form.
Many charts will not fit on a page.
The artwork is forced to be small.
The staple in the middle forces a low page count.
The low page count squeezes the contents down.
The reduced contents provides "almost" enough information.
… And the pages always fell apart under use.
I prefer a real book, like the hardcover The Traveller Book. Soft cover books with glued in pages are a necessary compromise to keep costs down, but if the book doesn’t last, then I prefer to stick with PDFs.
Just my 2 cents.