The things people seem to get upset about in Rust, the whole borrow checker thing, confuses me. Because often the reason the checker is complaining is because you're doing something wrong and would have a bug in another language. But because Rust brings these to the language/compiler level, vs leaving an exercise for the programmer, I suppose it looks more complicated.

I'd be surprised to hear that C++ is less complex than Rust (going by number of features or concepts or some reasonable complexity measurement).