I'm just accustom to the term "edge".
I have seen my share of those with Skill/Experience/Wisdom that have not been able to use all that today.
They are stuck in what worked 20 years ago, not what works today.
The word 'Edge' in trading makes me think of some kind of unfair, technical advantage...like a hunter using a GPS chip to hunt an animal that's been tagged -- or insider information.
Or Edge used by marketing Guru/system vendors.
The people you mention in your example who have/had 'edge' are the prehistoric floor pit traders who were simply scalping/arbitraging their client orders for peanut profits.
I would hardly call them skillful/wisdom/experienced traders.

Most floor/pit traders are bonehead, meathead neanderthal clerks who just process orders. -- they are not paid to think.
A true trader trades his/her own account, and ideally grows it largely or expontentially. Makes dynamic, snap judgement calls in the heat of the moment. And lives to tell the tale for another day,
Cowboys! The Wild Wild West 1999...there was a giant spider in that movie. The SPY. The height of the boom.
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