> What are Dart's killer features? It's not clear to me that killer features are really a thing for most languages. Sure Haskell has laziness/purity and Rust

> What are Dart's killer features? It's not clear to me that killer features are really a thing for most languages. Sure Haskell has laziness/purity and Rust has ownership. But what is C++'s "killer feature"? C interop? It used to be OOP but it's not that any more and yet C++ is still massively successful. What is Java's killer feature? GC? C#'s? I think most languages don't have killer features, they have killer platforms and frameworks. For C, it was Unix. For Java, it was servers and the broad set of libraries. For C# it was WinForms and now Unity. For JS, obviously, the web.