Umm?

I prove what point well?

that "oem" roller lifters are reliable or my cam is conservative?

I would think that the roller lifters that ou812 has that have been modded to address some of the probs would be the ticket

longer skirts around the roller to keep it from uncovering the oil galley with high lifts and edm/pressurized oiling to the neddle bearings
and link bar away from the block and to the inside

would be the way to go,seems they did there home work for longevity to me

dont know what all probs there could be..but roller lifters have been around since the 1800s

but again its qaulity control,I geuss that make the diff