Best explanation I've seen so far for Hemi cam/lifter failures

i'm told by my eldest who works at a dealership, the ones he's seen fail tend to fail in one of two ways.

1. The internal pin/lock that's part of the MDS function, gets out of alignment causing the lifter to turn into a solid lifter basically.
2. When the MDS turns off, the oil slammed into the lifter and it pressurizes extremely fast. The explaination he was given is that it slams into the cam pretty hard and causes the roller pins in the lifter to fail consequently causing the cam to fail.

i have NO way to validate these, but they make sense to me.