I think parent means "Ampere" being a bad ARM implementation, and Snapdragon X or Apple M-series being the good ones. It's mentioned in the article too. Ampere

I think parent means "Ampere" being a bad ARM implementation, and Snapdragon X or Apple M-series being the good ones. It's mentioned in the article too. Ampere performs really poorly on idle (101W vs EPYC's meager 19W). I haven't witnessed that problem on my Snapdragon X laptop. I'm not saying Ampere is bad myself though. It's obviously very competitive being a relatively new player and all. But, it's not as polished for desktop/laptop workloads as it seems.