For what it's worth, I think it makes sense to include defer in the "automatic cleanup" category. If we don't, then I think we end up suggesting that the only p

For what it's worth, I think it makes sense to include defer in the "automatic cleanup" category. If we don't, then I think we end up suggesting that the only popular languages that support automatic cleanup for anything other than memory are C++ and Rust. That does have some truth to it, but if the goal is to describe "languages that are viable today", it seems pretty clear that e.g. Python and Go are viable.