What if you forget to use that and just use let or const? It is better than plain try-finally or defer because you don't have to remember how to dispose of the

What if you forget to use that and just use let or const? It is better than plain try-finally or defer because you don't have to remember how to dispose of the resources but in terms of remember to dispose of the resource at all, I don't think that is all that different from Python's with or Java's try-with-resources. You can just forget to use using, with, try-with-resources. There isn't any way to forget to drop a resource if you have RAII.