Postgres Rust extensions is a completely different topic than rewriting PG in Rust. The problem is that a crash in any extension will take down the full PG work

Postgres Rust extensions is a completely different topic than rewriting PG in Rust. The problem is that a crash in any extension will take down the full PG worker. So you can havoc the robustness of your PG database with any extension. But with a memory-safe language like Rust which forces you to handle all error cases this can‘t happen anymore.