[0xb100db1ade]

May I ask how you made backups on save?

What you described sounds like it might come in handy some time for me personally

[mcpherrinm]

Vim supports an undofile, to keep undo history persistently. https://jovicailic.org/2017/04/vim-persistent-undo/

IntelliJ has a feature called "Local History" which stores basically is storing undo history, but it stores other things too (like test execution).

https://www.jetbrains.com/help/idea/local-history.html

[zrobotics]

A git repository would suffice, just commit throughout the project as normal.