I believe the issue you are seeing here is for the average hacker, they are more likely to notice a shaft bending vs a shaft performing. The super light shafts come at the expense of wall thickness. Less wall thickness means more prone to bending/cracking. I have noticed the average weight of the shafts has been creeping back up to that low 100s level, which IMO indicates a couple things,
1) the light shafts in steel were stupid in the first place, if you need light, go graphite. They won’t break as easily, it’s a perceived upgrade, charge more, same cost. The users who need light are also going to be ones who appreciate vibration dampening.
2) Golfers are recognizing, I liked steel because it gave me accurate shots. Lighter screws with that in the first place. Distance is NOT king in irons. You already hit a 7 iron as far as the old 5 irons, we don’t need 2 yards more for far less accuracy.
3) Now I can charge more for the Heavier steel as an “upgrade”. That’s what I see on tour, give me KBS / Project X, so I can be like Tiger McChambeau.
The next real revolution in golf will come in premium, heavy weight, graphite shafts. The claim will be simple, more control, great distance, custom launch angles and soft feel. Once you see more on tour, it will be on the racks. The first domino to fall will have to be a young gun using it on tour and a deal for the manufacturers to be able to put the shafts in as a stock offering at a reasonable price. You will get watered down profiles, but for average Joe, that’s going to be fine as long as it looks like the tour stuff. You will get the “pro” “tour” etc versions and the “distance” versions with lighter weight and softer tips. Manufacturers are already on board, they need a visible pro to use graphite and the world will change.