I've been climbing and backpacking in leather boots with exposed threads since the mid 1970's... I'm brutal on boots. I've slowly over years had stitching become abraded and lost a row or two in a small area, but that never affected the boots performance.
I'm honestly having a tough time trying to visualize anyone harder on boots than me... I'm one to avoid unnecessary stitching on a boot, but in general, looking over the Hanwag, I'd say they've been fairly restrained with excessive stitching (unlike what one sees on some Meindel models).
Just my perspective...
Cartridges are more alike than different.