Nobody is immune to plane crashes, terrorist attacks, or fatal heart failure – not even Linus Torvalds, who still has the final say in the development of the kernel he named Linux. This worries many, as there is no public record of who or what would take over leadership in case of an emergency.
Archive link: https://archive.is/mZQg2
There are linux compatible kernels in the works. There are some written in Rust too (although, at least one is MIT licensed). My prediction is that the linux kernel will die in its current form and be replaced by an alternative, probably an MIT one because industry loves that licence. Then we will have another Mac clone but based on Linux not BSD.