Best explanation I've seen so far for Hemi cam/lifter failures
I stumbled across this video and after watching it I think this guy has come as close to identifying the issue (and fix) as anyone. He worked as a Dodge/Chrysler/Jeep tech for years so he has tons of experience with these engines. He did mention Uncle Tony's video (without any name-dropping) and says his theory *might* have some validity but not as much as his idea. In a nutshell he claims that because the MDS works by sending oil pressure to the lifter bores to "unlock" the MDS lifters, it's when the MDS mode is NOT engaged that the lifters get insufficient oil. And putting in the MDS delete plugs actually fixes the issue because they leave the MDS passages open allowing constant oil flow to the lifter bores.
He goes a little long with the intro, doesn't start getting into the "meat" of things until about 11:00