Comment by Cyph0n

Also, you get the ability to use Rc (non-atomic refcount) as long as you’re not in a multithreaded env. The atomic version is Arc, which is similar to C++ shared_ptr.

And there are no footguns to using Rc. More specifically, you cannot mistakenly use a Rc across threads, because the compiler will ensure that you aren’t doing this thanks to the Send marker trait.