I teared up while reading this. I got the news while waking up in the same hammock in which I was sleeping while I was bumming it in San Francisco in preparation for Rust 1.0. That period was when I first met the Rust dev team, and of them, Brian was the one who first invited me into the Mozilla offices, gave me a tour, and insisted on taking a photo of me in front of the newly-installed Rust logo up on the office wall. Brian’s kindness and expertise are world-class. His excitement at Rust’s prospects to have a positive impact on the world are inspiring, and his devotion and persistence in pushing us to achieve that dream over the past seven years have been more than we could have asked from anyone. He’s a great developer, community member, and leader, and even though Rust is still in good hands, we will doubtless miss him dearly.
Brian, good luck in your future endeavors, and I hope to see you around here again someday. 
