The biggest problem with developing statistics on long term use is that knife enthusiasts are somewhat fickle and most of us either don't keep a knife all that long or we have so many knives to use that most of them don't get used that much. I used to buy a knife and carry it for a year or two, then buy another knife, etc. These days I have a group of knives that I like and so each one gets carried only 3 or 4 days each month. They will last a long time that way. I can understand you wanting to buy a good knife that will last a long time but will you use it exclusively for a long time or will you be like the rest of us and buy other knives that you can't resist?