It makes deployment really easy so long as you have the infrastructure to deploy to. I have most experience with Amazon ECS but you could also manage it with Ku

It makes deployment really easy so long as you have the infrastructure to deploy to. I have most experience with Amazon ECS but you could also manage it with Kubernetes on AWS, Azure or GCP. My company now deploys every app that can run on Linux as a Docker container, regardless of whether it needs a single instance or 50. It's not as though it doesn't introduce its own problems for example - you might patch software on the host but you still need to patch it on the container and it can be difficult to get an inventory of that, say there's a zero-day found in nginx. You still require organisational discipline, that never goes away.