I don't buy them anymore. Many reasons have been mentioned above.
I do have 5-6 of the old ones still hanging around since I used to mod them (a little) for gifts.
Some people are not affected by the new design, some are. If you are, that's fine. If you're not, that's fine.
It is not just because someone does not like change.
Iviverito1, I wouldn't worry about it. They are still a good knife. I really like their 12c27 and you can't find too many knives in a decent stainless for the cost.
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IMO, the problem they were trying to fix was having to get the peening on the pivot pin just right. If you look at this picture, you will see that one end of it is not even peened anymore.

There is a formed "groove" in the ring that the peened end of the pivot pin fits in.

Before the modification to the locking ring, both ends of the pivot pin were peened. The peening then prevented the locking ring from riding up when you locked the knife closed and also helped prevent the ring from popping off when you opened the knife if it was locked closed.
It held that tapered ring down on there.
I imagine that peening was hard to get just right. Sometimes it wasn't just right.
The new mod to the ring prevents the ring from riding up and makes it harder for it to pop off if you open the knife when it's locked closed. Holds the tapered ring on, as said.
It simplifies and idiot proofs the peening of the pivot pin.
They actually could not peen either end of the pivot pin and it would work now.
I imagine that retooling the locking ring that much would have been more difficult, though.
I have actually had the new ring wear too much on me and prevent tight lock up.
I smoke a pipe and used to cut tobacco at least daily. After many months of opening and closing the knife a lot, the ring wore and the little dent reached the end of the slot and prevented tight lock up.
I also prefer to file the top of the ring for a more gradual transition into locking and a tighter lock up and I can't do that anymore.
Other than that, still a good knife, though.
I do have 5-6 of the old ones still hanging around since I used to mod them (a little) for gifts.
Some people are not affected by the new design, some are. If you are, that's fine. If you're not, that's fine.
It is not just because someone does not like change.
Iviverito1, I wouldn't worry about it. They are still a good knife. I really like their 12c27 and you can't find too many knives in a decent stainless for the cost.
****
IMO, the problem they were trying to fix was having to get the peening on the pivot pin just right. If you look at this picture, you will see that one end of it is not even peened anymore.

There is a formed "groove" in the ring that the peened end of the pivot pin fits in.

Before the modification to the locking ring, both ends of the pivot pin were peened. The peening then prevented the locking ring from riding up when you locked the knife closed and also helped prevent the ring from popping off when you opened the knife if it was locked closed.
It held that tapered ring down on there.
I imagine that peening was hard to get just right. Sometimes it wasn't just right.
The new mod to the ring prevents the ring from riding up and makes it harder for it to pop off if you open the knife when it's locked closed. Holds the tapered ring on, as said.
It simplifies and idiot proofs the peening of the pivot pin.
They actually could not peen either end of the pivot pin and it would work now.
I imagine that retooling the locking ring that much would have been more difficult, though.
I have actually had the new ring wear too much on me and prevent tight lock up.
I smoke a pipe and used to cut tobacco at least daily. After many months of opening and closing the knife a lot, the ring wore and the little dent reached the end of the slot and prevented tight lock up.
I also prefer to file the top of the ring for a more gradual transition into locking and a tighter lock up and I can't do that anymore.
Other than that, still a good knife, though.