Don't get me wrong - CI/CD itself is of course a product subject to ongoing evolution and challenges such as scaling, aging, vulnerabilities, etc.

But usually, I would expect that "Project ABC" will build all its infra and CI/CD usage early on and then just proceed to consume that CI/CD as a commodity service, with ad-hoc changes needed to continue playing nicely with that service.

>> What I have found particularly infuriating is large companies with billions of dollars in revenue choose to completely ignore the productivity decline that comes from poor CI/CD

I hear you :-(