It’s not needless. I explained it a bit in my previous comment but it’s not worth diving into in this forum. To get an idea, consider scenarios along the lines of transforming a list of data in parallel using an async collection/iterator where all the futures are spawned and joined within the local scope of a single function. Hit me up in the Rust Discord if you want to chat about it and go into more details. Otherwise all I can really say is that I have encountered a few scenarios where this is necessary but shouldn’t be with improvements to the compiler.
