@Rat Bastid and I have discussed this a bunch and we agree on it but what he didn't mention is there are a few of us in our group running the edm lifters and "cool face"/grooved lifters including on hydraulic flat tappets. Exactly as he said low idle/low oil pressure at idle and we have a few guys with stout engines that idle around for hours in cruises and don't want to idle over 1k. It's just another form of insurance so rather than smack them upside the head (myself included lol) and crank up the idle speed we use the lifters for added protection. Just make sure you run a high volume pump with them, I like to run them in everything anyway.