Last week at the bindery in Cleveland, a customer brought in a 1920s prayer book that had been repaired three times with modern glue. The spine was a mess, the text block was falling apart. I told her the old timers would have resewn it on cords and skipped the glue entirely.
Three years ago I took a workshop with a guy named Harold from Boston who taught hand sewing only, no adhesives at all. He showed me how a properly sewn book can flex for decades without cracking, while glued spines fail within ten years. Last week I had to fix a 2018 case bind that someone used PVA on, and the whole thing just snapped in half. Has anyone else had better luck going back to sewn bindings over glued ones?