I guess I am missing the point on the factory versus custom locking-edge argument? Most of the custom folders that are used are not used 'hard' in the first place. Especially those with under 4-inch blades. If hard use is intended, I think most would prefer a fixed blade.
Seems like this argument is like comparing telling time with a $10.00 Timex versus a $15,000 timepiece? If you want special features, you upgrade from the Timex.
You are missing the point. The question was asked why collect fixed over folding.
My answer was that handmade fixed blades could offer a true performance advantage over factory made fixed blades while many custom folders could NOT offer the same increases in performance over custom folders.
In a large fixed blade I look for toughness and ergonomics that I cannot get in a factory piece. I also want distal taper and selectively hardened blades that are rarely done in a production setting.
Most factory folders use the same steels, from the same mills in some cases heat treated by the same folks that heat treat the customs. The customs usually have better fit and finish and handle materials, but rarely better heat treat, edge geometry, or lock strength.
In fact, I will put the lock of a Spyderco Chinook, Manix, ATR, Pikal, Temperance, or any of the Cold Steel, SOG or Benchmade Axis style locks against any custom liner lock or "Frame-Lock" in any short or long term endurance test.
There are some things the engineers at the factories have figured out better than custom makers. Product liabillity has made lock strength a high priority to factories since the explosion over the past decade in the training in the use of folding knives as self-defense tools.
A lot of folks don't agree with me. Usually those are the same folks who have a vested interest in selling or making $500 frame lock or folding knives.
Thats fine by me. That is their perogative.