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Grab a developer off the street and ask them how Docker works. Most of them will have no idea.

Considering my peers, same for system administrators/SRE/Operations people

I'm the resident expert because I bothered to piece together "containers" = "applied namespaces"

I can't speak for anyone else, but I definitely feel like there's no time to actually learn about all of these tools before being thrown into them by management/other well-meaning ICs. The end result is everyone is using a tool they know nothing about, with predictable results.

Totally agree. There are many, many pulls for attention - I don't really fault these people I mention. It's just notable that with all of this noise, the smallest bit of specialization can go a long way.

Honestly, habits/being adaptable are most of it. For example, don't waste time searching if you know 'ansible-doc' or 'man 5 something.conf' has it

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