Graydon has been on Swift for a while, and there are a few other prominent Rust contributors there as well. I hope they are enjoying themselves and make good things.
Indeed, Huon Wilson and Alexis Beingessner are both at Apple now, and happily they remain active in the Rust community as well (though under no uncertain circumstances are they allowed to submit code). I can understand why this is on HN, but as you say this is old news to most of us in Rust. For those not in the know, Graydon left Mozilla for a startup in 2013, and IIRC began at Apple in... 2015?
Really? Why is that?