And the company I worked for hired a full devops team to save us like 5 grand per month on Heroku, only to end up with a much worse developer experience.
This problem one doesn't have, if one pays attention to devops from the start, maybe keeping 1 or 2 capable devops people, who keep things lean. Problem is of course finding the capable ones with the right mindset to keep things as simple and lean as possible.
The result of suddenly needing to hire devops should be to get a convenient setup, but then do you really still need the whole devops team? And if you don't, then hiring them for limited time might come at a cost (hiring freelancers or consultants).