Most people nowadays who criticize Rust do so on a cultural basis of "there are people who want this so and it changes things therefore it is bad". But never on the merits.
Rust is a good language that contains in its language design some of the lessons the best C programmers have internalized. If you are a stellar C programmer you will manually enforce a lot of the similar rules that Rust enforces automatically. That doesn't mean Rust is a cage. You can always opt for unsafe if ypu feel like it.
But I know if my life depended on it I would rather write that program in Rust than in C, especially if it involves concurrency or multiprocessing.
Practically on embedded the issue is that most existing libraries are written in C or C++. That can be a reason to not choose it in the daily life. But it is not a rational reason for which a programming language sucks. Every programming language had once only one user. Every programming language had once no dependencies written in it. Rust is excellent in letting you combine it with other languages. The tooling is good. The compiler error messages made other language realize how shitty their errors were.
Even if nobody programmed in Rust, the good bits of that language lift the quality in the other languages.
