Huh? Deep Freeze, Deep Dup, and Ownership Transfer are all strategies to avoid multiple concurrent actors mutating the same objects at the same time. Even the

Huh? Deep Freeze, Deep Dup, and Ownership Transfer are all strategies to avoid multiple concurrent actors mutating the same objects at the same time. Even the last proposal, which I think has to do with fine grained locking, is still a strategy to avoid issues with mutable shared state.