Jones didn’t just go wild though.
There’s an ultimate fighter scene (jones vs Sonnen I think) where he was trying to teach his team how to throw gnp like him but in doing so effectively demonstrated why they wouldn’t be able to. Basically he was having them get into a guys guard and lay their arms straight up and down on the guys chest, then just bending his arm and striking with the elbow. The idea was that their hands are busy trapping your hands so they can’t block the elbow shots. He was like “it’s so easy, I don’t know why more guys don’t do it, they can’t block your elbow strikes if they’re hand fighting and if they let go then you have room to pass or throw different shots” But then you’d watch his team drill it and it looked terrible because their arms weren’t long enough to really extend and get power behind their elbow strike while their hand was trapped.
Point being, Jones had a pretty unique style that guys just couldn’t deal with because no one else could do the things he was doing so they weren’t prepared for it.