Many threads on this topic. What it comes down to is cows being slaughtered earlier in life now, so the thicker leather costs more. When only a double shoulder (right behind the neck) is thick as the average cut years ago, it's no longer economical to make them so thick. The hide varies a great deal in thickness, even in the same cut-area. Certain Brooks saddles are still this thick - they have a vintage series, and generally all the Pro / higher end saddles are thicker leather. Additionally, the rails and support are no longer forged, but stamped. I do love me a vintage Brooks.