The problem is that c and c++ have a ridiculous amount of undefined behavior, and it is extremely difficult to avoid all of it.
One of the advantages of rust is it confines any potential UB to unsafe blocks. But even in rust, which has defined behavior in a lot of places that are UB in c, if you venture into unsafe code, it is remarkable easy to accidentally run into subtle UB issues.
One of the advantages of rust is it confines any potential UB to unsafe blocks. But even in rust, which has defined behavior in a lot of places that are UB in c, if you venture into unsafe code, it is remarkable easy to accidentally run into subtle UB issues.