This isn't a stylistic choice for Fossil, it's a technical one. In Fossil, all clones have identical artifacts (modulo private ones) so rewriting history by ch

This isn't a stylistic choice for Fossil, it's a technical one. In Fossil, all clones have identical artifacts (modulo private ones) so rewriting history by changing the set of artifacts creates a much harder synchronization problem. Fossil DOES allow you to modify history, by adding new artifacts which retroactively change how previous artifacts are interpreted. They are called Control Artifacts and the set of things they can change are limited, but there's no reason additional ones cannot be added.