So I got in a discussion with someone why we need to test post-deployment. I was like because your environments are different you want to eliminate a failure point even if you've tested at build. You can make everything as closely similar to each other as possible but you want to eliminate the failures of a bad configuration, schema or integration. I once was at a place where someone deployed something and just let produce malformed data because a schema wasn't applied to the transformation process of the workers. You know what would have solved that? Pos deploy testing. How does is this in an automated pipeline, you automate the test.