Same here, I worked on Wang VS COBOL too. IMO, it had the best TUI Screen generation Tools I have ever seen.

Towards the end, I worked on a project to port Wang VS OS and its COBOL to AIX. I was tasked finding issues with COBOL Programs we had on the VS. It was a good environment, but Wang went CPT 11 before it was ready :) It was rather close to being complete.