I think it's now kind of a cross over from the bicycle world. Airshocks are lighter and more easily adjustable for various conditions. Not saying it's successfull, but you can't really judge from what happened in the 80's, can you? Materials, machine tolerances and overall designs have come a long way since then. I had plenty of Italian bouncies with air bladders. None them worked worth a damn. Best thing you could do was let all the air out and use stiffer springs and/or heavier oil.