Comment by nh2

I have not lost any Sublime tab in 15 years (I have tabs this old).

Sublime also saves a backup of its state files next to the state files in your home dir, so you can restore in case anything ever goes wrong (e.g. bugs in the new version).

The .sublime_session state files are JSON, easy to read for a human.

> spending an hour making up names for random junk files

That is completely unnecessary. You can just backup the '.sublime_session' file that contains all that before an upgrade if you are worried. Sublime already stores all its state in 1 file; manually spreading that across N files seems unfun busywork. A quick web search reveals that by the way.

(I perpetually have 40 Sublime windows open, each one with tens to hundreds of tabs. My 'Auto Save Session.sublime_session' is 70 MB.)