As Docker is already a very mature tool, there are areas where it can be improved based on real-world usage. One area I consider is the Windows container experience. The pain point here is that Windows containers are heavier and slower than Linux containers because I have worked in both environments and felt that Windows containers are heavier and slower than Linux containers. This also limits the ecosystem and tooling maturity compared to Linux containers. Improvements could include performance optimization and better parity with Linux container features. Apart from that, observability and debugging is another area. The pain point is the limited native metrics available and limited logging and tracing features. Improvements could include adding a good amount of metrics, logging, and tracing, as well as better built-in observability features and easier container introspection. Network complexity is also present. I face issues with Docker networking that can become confusing in complex setups, and debugging container-to-container issues is not always intuitive. Improvements can be made with simpler networking abstractions and better built-in troubleshooting tools. Docker is excellent for containerization and CI/CD, but it can be improved in areas of built-in security, network simplicity, and observability. These points should be kept in mind and worked on.
