I've never seen 100+ wire nails in a shoe. 30-40 would be on the high end from my experience.
Still that's enough to cause the damage mentioned earlier.
Agreed, autosolers have a rapid fire if they are not used properly. Personally, I don't like or use them either.
However, If used like a machine gun that will likely cause the driver to snap causing the blade to get damaged. A re-built blade costs approx. $400.00.
When attaching a rubber heel (base) -or- full heel the heel...