There's a little bit of memory that you didn't have before. But sort of, it really is zero overhead if no exceptions happen. Portability is o it rather depends on testing. If the technology we used was so hard to understand and so hard to learn, making it so hard to maintain, then as an open source project, we'd lose velocity. And i don't think the hat would be healthy for the python eco system. We may want to look to the future, sort of risk five.