Are you talking about single-bladed or multi-bladed pocket knives?
If you are talking about multi-bladed pocket knives, I think the Swiss Army knives have rather occupied the field there. I do believe that many of them are sold so they are by no means dead. In the US we are urbanizing quite a bit so many people are coming under typically urban statutes which limit the length of knives carried in a pocket. This makes the longer pocket knives less popular (also sort of a misnomer, I suppose belt knives would be a better description now). Who wants to mess with a belt sheath all the time? IMHO, most people buy larger pocket knives for camping and fishing, and probably don't use them much otherwise. Smaller pocket knives are probably quite common (I always have my Victorinox Executive on my key chain, love that scissors).
I know less about the popularity of single-bladed pocket knives, but the above-mentioned "urbanization" theory would probably apply to them too.
Auger
If you are talking about multi-bladed pocket knives, I think the Swiss Army knives have rather occupied the field there. I do believe that many of them are sold so they are by no means dead. In the US we are urbanizing quite a bit so many people are coming under typically urban statutes which limit the length of knives carried in a pocket. This makes the longer pocket knives less popular (also sort of a misnomer, I suppose belt knives would be a better description now). Who wants to mess with a belt sheath all the time? IMHO, most people buy larger pocket knives for camping and fishing, and probably don't use them much otherwise. Smaller pocket knives are probably quite common (I always have my Victorinox Executive on my key chain, love that scissors).
I know less about the popularity of single-bladed pocket knives, but the above-mentioned "urbanization" theory would probably apply to them too.
Auger