I vouched for this comment because it’s a valid point and I’m not sure why it was killed.

I happen to disagree strongly, though: lots of engineers in my experience undervalue the work of systems administrators and underestimate the effort needed to operationalize any technology.

Running your own is absolutely fine if you are willing to keep your stack small and invest time learning the tools you pick. But there are still horror stories of people thinking snapshots are backups, turning the wrong knobs and turning off fsync on their databases, ...