[zb]

I think that GitHub's pull-request-based model is fundamentally broken. Gerrit's model, where every commit is quasi-independent (and hence must pass tests) and you can easily edit without force-pushing anything or losing review history, is superior (though not perfect) in almost all cases. (Exception: merging a long-running feature branch where all the commits in the branch have already been reviewed.)

This is GitHub's attempt to solve the problem without really changing anything. It won't really change anything. Since pull requests routinely contain a mixture of both changes that should be squashed (fixups) and changes that should not be squashed (independent changes), this just means that you get to pick your poison.