When I see a hundred year old knife, I have to wonder how many years it sat in a drawer someplace. I don't think any knife used day after day will last a lifetime. I used a Buck 301 for 25 years, and it was ready to either retire or be sent to Buck for a blade replacement. An man I know has used the same Case yellow sodbuster for about 20 yeas, and it looks like it should be replaced. A knife is by nature, a disposable tool. Every time you sharpen it, a little bit of blade disappears forever. If you are in a job where you really do use the knife a lot, it's going to wear out faster than a pocket knife used by an office cubical worker.
So, it all depends.
Carl.
So, it all depends.
Carl.