Ask HN: Branching File Systems?

I'm aware of VAX/VMS's versioned files, which was super useful back in the 1980s. Hello;1, Hello;2, etc.

We've got GIT, and other version control systems, but this idea came up last night during Lex Fridman's podcast with the team from Cursor.[1]

Has anyone experimented with branching file systems?

[1] https://lexfridman.com/cursor-team-transcript#chapter13_branching_file_systems