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Re:Ten Years of Vim by chongli on Monday May 21, 2018 @12:33AM (#17116153)
Vim also has persistent undo. Check out the options:

    undofile
    undodir
These will cause vim to store all file histories into files within that directory. Now you can close and reopen vim and continue undoing as much as you want!
Re:Ten Years of Vim by wildmusings on Monday May 21, 2018 @07:36AM (#17117604)
Do you know if there’s a way to make “normal undo” stop at the beginning of the current session, then have some special command or confirmation that I indeed want to move further back? I almost never want to undo past the current session, but occasionally I do.