It's worth taking to heart. It seems to have come out of Heroku-land, and it's baked into Heroku. Of course, that's an even more restrictive environment in some ways, but the underlying concepts are true for larger and more complex things than can be easily executed in Heroku.
Now all you have to do is get them to grok immutability...
Now all you have to do is get them to grok immutability...