Bangoman
Hobbyist at best,
And I see your point there.
Not putting anything down, I have not seen one set of S.L. golf club anytime whether I was on the golf courses or at a driving range. Our region is one of the "booming" economic body in the Nation according to the official report and I Had not seen a single set of S.L. irons on the golf course nor at the driving range. No brick and mortar retail stores have it on the showroom floor either, at this point.
I sincerely wish the new idea takes off and GROW, we need stimulation in the industry. However, I remain skeptical if the idea will survive in the long run if nothing new to improve on the basic manipulation of head weight and trim the shaft with the same spec to fit.
They need to figure out a better fitting, involving the changing the weight and the character ( flex, flex point ) of the shafts used in the same set.
Ideally ( in theory ) is to have a set of shaft made just for the S.L., not the traditional trim and fit method. Each and every shaft in the set will be made for the individual iron so the shaft in the 7 iron would be totally different than the 9 iron except for the length. Weight, weight distribution, flex point all different..... it could be made from a combination of material to achieve the harmony of feel and acceptable result of ball trajectory and distance gap.
IMHO, this will be an entirely new frontier to be explored, With the aid of the artificial intelligence for design and the ability to manipulate composite material, it should be pushed forward as fast as time and resources allowed before the flame dies down.