Uncle Bob's comments
Uncle Bob Martin has a Youtube video about history of programming. One thing he notes was in the old days (pre mid 70s) most IT professionals were seasoned professionals who wandered in from other fields. They had skills and maturity that he notes is often sad lacking in many IT companies. He also noted that agile type methods were commonly used by these old timers. What they did differently was to realize projects have different natural rhythms rather than have "scrums" (idiotic term if you know rugby) and 2-week "sprints" because some insultant said that is how it is done.
DevOps seems to have the same problem, insultants who have a "magically" method to solve all your problems but never do.