Comment by bsder

> But apparently issues like iterator invalidation and other mutability conflicts don’t rate.

They don't, because you're using java.util.concurrent when you need data structures that deal with concurrency.

I miss java.util.concurrent terribly when I have to program in any other language. I don't miss Java, but I weep every time I need the equivalent of ConcurrentHashMap or CopyOnWriteArrayList in another language.