I'd argue that GPL-licensed works should remain "authorial", and that each commit generates a new derivative object and, thus, a new copyright. In that sense, t

I'd argue that GPL-licensed works should remain "authorial", and that each commit generates a new derivative object and, thus, a new copyright. In that sense, the "old code" goes into the public domain in ~28 years, but the "tip of tree" remains firmly GPL'd.