I'm not that cruel, it'll only be 869 forks!
An actual save game system has never been created or really considered afaik, but JAD has the campaign map, which could 100% support branching paths. And I'd dare say would be even much more elegant at it than just mudane saves.
On that subject, JAD 2.21 re-re-rerelease soon and 2.22 next month. I put some degree of effort into helping JAD be 11% more rad than before. Be sure to check it out!