[arch-ninja]

Guarantees about those things are impossible to add after a language/community abandons them, and you can Arc::<RWLock<T>> your way to writing Java pretty fast. I hold that keeping the strongest-possible abstractions is the best decision, even if that means your average developer needs to learn borrow checking. I've started a career writing Java, spent a year with Rust, and when I came back to Java my data structures were 5x as useful. I could spit out features _WITHOUT_NULLPOINTER_ISSUES_ in hours where previously it would have taken a week.

Yes there is a skill gradient, but everyone who doesn't climb that hill is a fool and a weaker team member for it in my opinion.