This risk factor is on the machining of the block, more specifically the lifter bores being straight and round. Not the cam and lifters. The internet craze of cams going flat isn’t what everyone thinks it is and is IMO blown out of proportion. In my 38 years of playing with engines and more camshafts changed out than most people would ever do, I have one and only one cam go south on me. That was my mistake. I rushed it. The lifter bore needed to be addressed.