That's the point: if file systems that basic would NOT lose data, then it is unacceptable if another file system does. Maybe to put it differently: new file sy

That's the point: if file systems that basic would NOT lose data, then it is unacceptable if another file system does. Maybe to put it differently: new file systems should offer improvements wrt reliability for stable features of the file systems of the previous generation; regressions are unacceptable.