[twotwotwo]

> > RAID or storage replication in distributed storage <..> is not only useless, but actively undesirable

> I guess I'm different from most people, good news!

The earlier part of the sentence helps explain the difference: "That is, because most database-like applications do their redundancy themselves, at the application level..."

Running one box I'd want RAID on it for sure. Work already runs a DB cluster because the app needs to stay up when an entire box goes away. Once you have 3+ hot copies of the data and a failover setup, RAID within each box on top of that can be extravagant. (If you do want greater reliability, it might be through more replicas, etc. instead of RAID.)

There is a bit of universalization in how the blog post phrases it. As applied to databases, though, I get where they're coming from.