I found this on the same website
source:
The Transition from Bare Knuckles to Gloves
"In the bare-knuckle era, fighters had to carefully aim and select their punches, in order to protect their hands. In-the-pocket trading of four, five or six punch combinations was far more rare than in modern times."
I'm not sure about the 4, 5, or 6 punch combinations are rare statement. I don't think it was limited because it protects hands. I think it was limited because after 4 punches your opponent starts to key in on the timing of the punches coming in. I think I have a video of me fighting where I'm taking punches to the face and it looks bad, but in the storm I fire a well aimed shot to my opponents chest. Just thought of this. I should probably stop punching him in the heart when I do this technique. But anyway. the body has the excellent ability to recognize patterns, so a 4, 5, 6 combo is likely to put someone into danger as it sets the predictability of when the next impact will occur.
I usually refer to it as sitting through the storm, waiting for the opening that will appear.