I just received a closeout long strap. It’s not a bouncy strap at all. As mentioned, older designs were built differently and did have a stretch to them.
I can’t work with a stretchy strap, and my favorite strap ever was the old cotton web Earth III straps that Roger actually reissued a while back. I have other types but those are my go-to items. I don’t think they’re available anymore and it didn’t seem like the straps would be an evergreen offering in the Sadowsky store. They’re unobtrusive but still very 80s. I did a sobering assessment of how many years I have left to play music in a happy and healthy manner. I divided that how long it takes to wear out those straps, considered the number of instruments I play regularly, and accumulated a lifetime supply of them. My demise is not near, and the number of straps I have is a double digit!