The system is the specification. Working software that is 65 years old is an organic and evolved entity that can't be manually ported or updated.
Another possible target for this is the IPPS/OPPS Medicaid/Medicare code calculator system - which was written in COBOL for IBM 370 by mostly a single developer. Sadly, the developer passed away about 10 years ago, and the system has yet to be updated. The code was open sourced in a bid to gain assistance for updating from the community. Automation such as this would help significantly.
The info I have on the unfortunate death of the developer was word-of-mouth from people close to the industry when I was working on a project in the domain.
Another possible target for this is the IPPS/OPPS Medicaid/Medicare code calculator system - which was written in COBOL for IBM 370 by mostly a single developer. Sadly, the developer passed away about 10 years ago, and the system has yet to be updated. The code was open sourced in a bid to gain assistance for updating from the community. Automation such as this would help significantly.