Modern DevOps relies on spinning up a server in minutes to run automated tests and ensure the code is safe to move to production.
The 2006 release of SAP ERP 6.0 predates Docker's initial release by seven years! The two technologies are geared towards different scenarios: think monolithic on-premise server vs. cloud-native microservices. What could be gained by combining the two? Software development teams outside of the SAP ecosystem are years ahead in leveraging DevOps ideas, automated testing/continuous integration, and modern version control tools (i.e., GitHub) to realize tremendous productivity and quality gains. Containerizing ERP would be a considerable step towards accessing these advantages for ABAP development.
We've been applying DevOps for SAP to our product development and couldn't be happier with the results.