Reply due to rate limiting:
K&R didn't know about CI/CD, but everything else you mention has either existed for over 30 years or is too trivial to argue about.
Conversely, if you took Claude Code or similar tools back to 1996, they would grab a crucifix and scream for an exorcist.
I think you're taking for granted the massive productivity boost that happened even before today's era of LLM agents.