There are definitely fringe edge cases where C++ can do things that Rust simply cannot, currently. I'm thinking of things like Herb Sutter's deferred_heap (htt

There are definitely fringe edge cases where C++ can do things that Rust simply cannot, currently. I'm thinking of things like Herb Sutter's deferred_heap (https://github.com/hsutter/gcpp https://github.com/hsutter/gcpp) that give you GC-like abstraction. It's pretty cool that this is possible to write in vanilla C++ with decent ergonomics. I tried to make something similar awhile back in Rust and hit a wall in terms of making something that would be pleasant to use. Rust has several on-going experiments with making a nice GC, along with good support for arenas. (If you can use arenas, they're great.)