> threads and locks are so easy to do! I don't think concurrent programming was ever particularly easy in Java. If you're talking about `synchronized` methods,

> threads and locks are so easy to do! I don't think concurrent programming was ever particularly easy in Java. If you're talking about `synchronized` methods, well, they are of limited usefulness (to put it mildly) when you need to lock objects in an interleaved fashion: "lock A, lock B, unlock A, lock C, unlock B, lock D, unlock C, etc.", which isn't too uncommon a user case. > stuff that previously could only be done in C/C++ (...) almost as easily as writing Python or Ruby Metaprogramming, any? C++ has templates. Python and Ruby have metaclasses. What does Go have?