How common is a wiped cam lobe?

I have to say this, Cam failure is nothing new, It was very common, even back in the 60s/70s, I can't count how many engines i'v tore down that had lobes failing or wiped, Chevies were more common because of there smaller lifter diameter, The problems today are different cam profiles with aggressive ramps, higher spring pressures, Lack of "good" block prep" on a 40 yr. old block. Egg shaped lifter bores" not letting the lifters rotate in there bores, When this happens, Say good-bye to your camshaft, That simple!! Taking extra precautions on cam prep when building a hot-rod is just as important as it was 30-40 yrs. ago, I'd bet anything if you hone the lifter bores & make them true, Drop in a stock style FT cam with average spring pressures & lube up the cam properly, You'll not need the fancy oils/additives & the cam will survive awhile . BUT when you start installing aggressive cam profiles, Higher lifts, Higher springs pressures, Larger Valves, You need to take the extra pre-cautions.

There are some lifters out there with crappy lifter faces, This is a very important area, The lifters need to "always" rotate on any FT cam, ALWAYS, Rollers do not, Over the years Car manufactures had to do away with FT cams for this reason, By 100K miles there wiped in some areas, same with Timing chains, There passe".