Enterprise projects require Continous Intgration and Continous Deployment (CI/CD). In Azure DevOps this is possible, of course, but in the past it was a challenge to keep the CI/CD pipeline definition in sync with the code versions, especially across different stages/environments.
Azure pipelines with YAML CD fixes this issue, because the pipeline definition YAML file is part of a repository and now can be versioned together with the app / service / container one intends to deploy.
Any changes to the pipeline can be validated together with the rest of the codebase through the different stages. This provides absolute control and helps to avoid configuration and carry over errors between stages, quite a bit.
A very helpful and long-awaited feature!