This is kind of a misfit topic; 'Book Recommendations' seemed like the best fit.
Dust jackets on cookbooks are a real dilemma for me. I hate them. They are so impractical on a book you are regularly going to pull down from the shelf, they'll soon tatter. And most of a dust jacket's purpose is advertising, which is obsolete once you have it home.
So why don't I just get rid of them? I was raised to respect books and it feels like it's part of the book. It feels like sacralige to get rid of them. And some have beautiful photography on them. I really wish all cookbooks were designed like "Ottolenghi Flavor", "The Professional Chef" and "Modernist Cuisine at Home", where the book's own cover has all the beautiful photography and such, and there is no dust jacket.
By the same token, I think book designers sometimes don't think through the practicality of their designs. I have one cookbook, a popular UK chef's first, where the title was originally in cream on baby blue, now faded to illegibility. Unfortunately, the book designer made a similar mistake on the actual book spine, and if exposed to light it would in a few years also be unreadable.
So what do I do? I toss them when they become shredded, but mostly I stay annoyed and grumble, LOL.