We don't maintain futures-rs. But for the reasons you outline above (stability), our interface is also effectively done. The choice of not using all of futures

We don't maintain futures-rs. But for the reasons you outline above (stability), our interface is also effectively done. The choice of not using all of futures for their interface is outspoken the strategy of tokio. We have encouraged them to prefer the futures layers, but we don't see the work happening. So, to answer your question: we are not working with them, the place of collaboration is futures-rs.