Most of those things mentioned aren’t bona fide needs for me. Once a developer is deploying their project, they’re watching it go through the pipeline so they can quickly respond to issues and validate that everything in production looks good before they switch contexts to something else.

I see what you’re saying though, depending on what exactly is being deployed, the policies of your organization, and maybe expectations that developers are working in another context once they kick off a deployment, it could be necessary to have alerting like that. In that case it may be wise to flex some features of your CICD platform (or build a more robust script for deployment that can handle error alerting, which may or may not be worth it).