You're right that that does make the assertion somewhat less ridiculous. But it still sounds like he's saying that he expects the SSDs to be more reliable than regular drives.
What he sounds like he's saying and what he is saying are very different things, and his reply sounds pretty different to me than to you, I think. The comment he's replying to is:
Looks amazing! Some real professionalism there! However replacing a hard drive is going to be a pain! Wonder if there is a way to modify the mac mini to allow a more accessible hard drive access?
So I read his reply as separate statements: a) They're all applecare covered, and non-vital so he won't need to muck around with maintaining the individual mini's, and b) They're running SSD's not HDD's.
You could have avoided the hail of downvotes if you had of included your conclusion that you read the applecare part but still understood it as he was saying the SSD's were more reliable. I don't think I've ever seen a comment of just 'lol' escape downvotes on HN, it's pretty clearly not good HN etiquette.
