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.
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?
Some employers do not like employees doing things on the side without permission.