> Devops and sysadmins can no longer withhold information to maintain job security.

I can't imagine this is very prevalent. That's a very 2004-style corporate immaturity; I get the sense that even the slow-moving behemoths of the software world have mostly caught up to, say ... 2017's recognition of the importance of automation and reproducibility and won't tolerate the kind of malpractice you describe--wilful information siloing by infrastructure teams.

Like, those businesses might well suck at automation! But they've been doing it and firing the people who resist it for a long while now.