Preferred form for making modifications

There isn't really one thing such as "the" history, it's a continuum and any line drawn would be in an arbitrary place. Should it be possible to access every version that was ever tested by some internal Trybot / 0day even before getting approved and merged internally? There's a lot of value in test results after all. Going even further, should it possible to get every version that is in the developer's reflog? If it was committed at some point then it must have some value. Getting inside the thought process of a good developer is surely a useful learning experience, observing mistakes made helps not repeating them.

BTW *open-source* developers rewrite history, that's part of the public review process. Sometimes some of these git histories get lost!
https://public-inbox.org/git/70ccb8fc-30f2-5b23-a832-9e47...
https://github.com/git-series/git-series
So shouldn't these open-source developers be forbidden to "unpublish" and unshare these? It's GPL code after all </devil's advocate>

> But this can only be accomplished by convincing the companies that working together with the community provides some benefits. And without the companies willing to work together, I think, even a git repository with history is not really helpful.

This is the best summary.