> And "similar" in terms of results, NOT similar in terms of performance as try {} block requires additional instructions to set it up, whereas RIAA is runtime free.

By similar I meant from the compiler's point of view. `try...finally` is the low level primitive to ensure some code runs at exit. If something throws an exception then destructors must run when unwinding the stack, which is what `finally` is for! But if you disable exceptions then `try` blocks are probably all basically no-ops.