When we developed the Pin API, our vision was that “ordinary users” - that is, users using the “high-level” registers of Rust, would never have to interact with it. We intended that only users implementing Futures by hand, in the “low-level” register, would have to deal with that additional complexity. And the benefit that would accrue to all users is that futures, being immovable while polling, could store self-references in their state. Things haven’t gone perfectly according ...
