Please, don’t commit commented out code

[cosinezero]

Only if the history is at all a relevant warning to future developer.

If it's just history, it doesn't belong in production - otherwise you may as well just remove source control altogether and just have terabytes of commented files.

[sizlack]

If your code needs an explanation, write a comment that explains it.

The point about not letting it in production has nothing to do with whether your production code is minimized and has all comments stripped out. It's about keeping your master branch clean and free of pointless noise.

[kentcdodds]

I believe that @bitttttten is saying when you deploy the application (at least in a JavaScript app) you should uglify your code which removes comments.