Interesting point, fairly logical but didn't sit to think it through before. Indeed, using arenas to get back features of manual memory management won't lead to the same security issues than outside of a memory safe language.

Interesting approach for a project to collect such traps in there dependencies like this.

The contrary is indeed claimed too often. This is far from a simple protocol, and that's probably to be expected seeing its history and success.

Definitely over engineered but a good way to play with many interesting tools.