The person who quit wrote the Linux graphics driver for Apple M-series GPUs in Rust.
edit: I may have gotten some things confused, please see below
No. The person who quit upstream kernel work is Marcan, the head of the Asahi Linux project. The person who developed the kernel driver for M-series GPUs is Lina.
Not sure why my comment was flagged, but marcan is Asahi Lina. There is demonstrable proof in threads all over this comment section.
So they stirred a whole lot of drama for not much, potentially harming R4L.
I am not willing to pass a value judgement on his decision to do this, but I do agree that I don't think it ended up being helpful to R4L.