v1.0-pre and v1.0 share the same internal version number (rup 206, "Beta 2") but differ in ~99 of 111 shared source files [1]
While I shouldn't complain because they just won't do these releases in the future and I accept it was a different time; I still find it surprising Microsoft didn't have better version control considering they took it seriously enough to build their own internal version control system (SLM). [2][1]: https://github.com/microsoft/comic-chat#:~:text=v1.0%2Dpre%2...
[2]: https://devblogs.microsoft.com/oldnewthing/20251028-00/?p=11...
Microsoft had just acquired SourceSafe in 1995, but it's not clear to me how similar to modern version control systems SourceSafe even was in 1995/6. It may have been more of a distributed lock manager than change management system.