They solve the use-after-free issue by keeping pointed objects alive, not by helping you think better about object lifetimes in your code. That means some objects will live for longer than you initially thought they would, and potentially even introduce circular references. Added to that, they also introduce random, unpredictable slowdowns in your application to run their algorithms.
I'm not yet sold on Rust, but exploring alternatives for achieving memory safety without needing to put on a GC is commendable.
I'm not yet sold on Rust, but exploring alternatives for achieving memory safety without needing to put on a GC is commendable.