I am a cloud application architect with 10 years' experience in software development in several languages, including Perl, Java and C#. I'm an Irishman living in Calgary, Canada. GitHub on @cubikca.
Location
Calgary, Canada
Education
BSc. Computing and Info Systems, Athabasca University
I guess a few comments. It's not always entirely clear what you are presenting as the myth, so I'll just add a few of my personal observations.
DevOps and Project work are separate things. You can apply an Agile approach to project work and use a DevOps workflow for, well, daily operations. So DevOps does not really succeed Agile, nor does it replace it.
Rising error rates when implementing DevOps should come back down over time as the process starts eliminating errors and improves code quality at submission.
Automation may not overcome all hindrances, but you won't implement DevOps in a large and complex system without it. We release 2-3 times per week, and a manual release would literally take hours.
DevOps implemenation has been standardized in our organization and the fundamentals are followed for all projects.
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I guess a few comments. It's not always entirely clear what you are presenting as the myth, so I'll just add a few of my personal observations.