Tech and science books aimed at the scientific literate but non-specialist have all but disappeared. The physical quality of fiction books in terms of print quality and binding are just garbage compared to 25 years ago.
It is a bit sad for a book lover. Our home is still filled with multiple thousands of books, probably also several hundreds still unread as new books were bought at a higher frequency than they could be read, so moving down the strata of an ever accumulating 'to read' sediment.
With the instant availability and fulfillment of online eBook purchases, that vice has disappeared together with it's joy.