Well having written a lot of C and a lot of data structures, particular in low resource devices, I'm well aware of the details needed to do so. I suspect many others are in the same camp. Pointers are hard, however after 10 years of practice there not so bad ;)

I feel that saying ohh you should never need to write your own pointer chain (linked list, trees etc) is a bit too sweeping and doesn't match my experience.

"not particularly relevant to most Rust programmers" begs the question is their less of an overlap from C programmers and Rust programmers than is being generally touted?