Boy, I don’t know. I think if you have a partial tear, this might work, but how can a complete ACL rupture repair itself? There’s no stability. You certainly couldn’t return to contact sports.
We do know, that with ruptured discs, if your wait, they heal. AT one year the outcomes are about the same as if you had surgery,
if an MRI with the knee at 90 demonstrates coapted ends, then maybe I would entertain this as possible. Don’t know if the knee can be scanned at 90?
Still, too many variations on the tear site (mid-substance, off the bone at either end) for this to make sense.
I’d have to agree on that - a “rupture” cannot even be close to a “separation”.