> Doubly linked lists aren’t that important today.

I guess Rust is just not a viable or good language if one cannot even implement easily something as basic as a doubly linked list. Doubly linked list is the bare minimum; if that is not easy to implement, more complex data structures will often be even worse.

Rust, contrary to public claims, often does worse on memory safety than C++, which is a sad state of affairs.

I fear my arguments are way stronger than yours, sorry. Please make it easier to implement data structures in Rust.