Flying Crane
Sr. Grandmaster
There is something to be said for preserving history though. I mean assuming the forms are historical then they do have a sort of value and should be passed down.
Clfsean beat me to it.
Nothing about any of this material, or ANY martial art at all, is divinely sacred. It was all developed by humans, is practiced and taught and passed on by humans, to other humans. If it falls out of use, if nobody does it anymore, it won't stop the sun from rising tomorrow morning.
Martial arts is a folk tradition. It is passed on from generation to generation, thru a teacher-student relationship, and includes a body of knowledge that is not common to the masses. If the folk tradition is lost, then it is simply gone and cannot be re-created. The creation of a new system can replace a lost system, but it's not the same as the lost system.
If the SD material is being done poorly and is not understood properly and is not functional, then preserving it simply for historical purposes is meaningless. It is not an artifact that can be placed in a museum for society to preserve. It is a skill and body of knowledge. Once the skill and understanding is lost, then the movements are just hollow mimicry and no longer have meaning or purpose. It is a waste of valuable time that could be spent in training something that is properly understood.