The problem with the sole on my Raichle boots is the middle layers which is now cracked on both sides and on both boots, its starting to disintegrate, I assume this middle layer is the shock absorbing layer.
This is exactly how my Raichle boots died (nearly 9 years of hard use, one re-sole) - a new sole unit was more than the boots and the old leather deserved, so I binned and bough something else.
I have now taken the route of 'lighter and cheaper' so I am less fussed about quite how durable the boots are going to be. Having put many a Munro under approach shoes now, the grip and support of modern shoes is not in question. For me it is durability - and it is less than an older skool leather clumper boot.
I now look like the honey monster in orange Salomon A-Alp Mtn....