In enterprise, you are dealing with many years of decisions, integrations, and changes in architecture. Business processes changes, development team processes change, IT vendors change, and leadership changes. You also do not have the source code to everything that the business depends on. What you have are the glue scripts and integrations to various black boxes that change their behavior every update. This is not a question about DevOps. It is also not a question about business process or change management. With large organizations, this is really more about governance and regulating the different independent vested interests.

> idea-to-production still takes years in environments where months should be achievable

Source? My career isn’t terribly long, and it’s all been at startups, but it’s never taken me or any team I’ve been on years to ship anything.