That is a bad take, because that imply "crappier language will be used for MORE decades".

Rust is an absolute improvement over C/C++ in major ways. Once there, for ALL THAT DECADES all the developers and all the code written will be spared the problems of "crappier languages.

In the short term there are adaptation issues? fine. But that will be erased (way faster than is possible with C) and suddenly, never again worry about things.