Oh yeah. I remember that clearly. It was Copland- er, MacOS 8.
What a cluster----. Back then, crashes would result in a special kind of debug screen called MacsBug[0].
When you walked into their "release-ready, hands-on lab," almost every screen was displaying MacsBug.
The change didn't actually happen until NextStep became Cocoa.
I was also at a Microsoft "Longhorn" prerelease event. They were showing "live code demos," but you could clearly see the presenter quitting Director, when they were done with their demo.
That became Vista, another famous success story (but at least, it did ship).
[0] https://en.wikipedia.org/wiki/MacsBug
