Rust core development is working on many important features in parallel. The feature I have been most excited about, and wish was here already, is async/await. I wrote quite a bit of asyncio using futures and it was a bloody, exhausting experience. Lack of documentation or examples made the experience even more challenging. Much of what I wrote could be trivially refactored to async/await syntax, but I may keep some around to honor hard-earned gains. It's not clear to me yet whether the first stable release in Q1 2019 will allow me to port everything but I look forward to finding out.