I fully agree with you, and actually I want to write a summary of those less-discussed features that have high productivity impact including the predictability you mentioned in the future.
Though, for the people who haven't explored Rust yet, I still think that focusing on the memory safety, the most powerful feature, is a good approach. Personally I tried explaining other smaller benefits first, e.g., immutable by default, move by default, no header files, but didn't work well as I thought. Exploring another language is a significant investment, and people need a significant reason (at least those that appear to be at first glance).
Though, for the people who haven't explored Rust yet, I still think that focusing on the memory safety, the most powerful feature, is a good approach. Personally I tried explaining other smaller benefits first, e.g., immutable by default, move by default, no header files, but didn't work well as I thought. Exploring another language is a significant investment, and people need a significant reason (at least those that appear to be at first glance).