Since it's the struts that do the pushing, and they are spring-loaded, there is only a small amount of force that can be transferred to the ring from the slider, before the slider pops over the struts; I just can't see it ever being abuse.
I'd like to assemble those parts in a press and see how much hydraulic power it actually takes to break a ring like that............I bet it takes a lot.
But, for all the talk, Chrysler did redesign those rings in 1971. Maybe this is why.......
I mean I know you know this, I'm just musing.