What problem does this solve or what need does it fill?

Web and native stream interoperability

What solution would you like?

Literally

pub trait ConditionalSendStream: Stream + ConditionalSend {}

impl<T: Stream + ConditionalSend> ConditionalSendStream for T {}

What alternative(s) have you considered?

Writing it myself, which I did

Additional context

Stream support on web seems pretty important, especially since there's new work going into async, and streams are basically async iterators.

My specific use-case is to stream data from an AI via an LLM serving SSE content over http, and have that work on WASM.

Here is my implementation in my own crate: https://github.com/loopystudios/bevy_async_task/pull/16/changes#diff-b1a35a68f14e696205874893c07fd24fdb88882b47c23cc0e0c80a30c7d53759R37-R49