[jacobr1]

I think the cost is roughly: "we force you to reason about, and account for safety in the code." Then given that this is now explicitly forced upon the developer, are Rust's constructs overly complex, or reasonably once someone gets over the learning curve? The alternative is using a managed runtime, which probably should be the default for most programmers. But for those that are doing systems programming, we absolutely need something "like Rust." The memory access patterns need to be explicit.