Sure thing. As a server-side language, love it. I also do all my command-line scripting with it, too.

Async/await is implemented really well (Google hired Erik Meijer to help them build it), their threading model is excellent, and there are built-in keywords in the language for stream handling that are seriously productive [1]. Anyone that knows Java/Swift/Kotlin/ObjC is going to be productive in Dart very, very quickly.

Performance has been great, but someone else may be better qualified to answer that question. Much of the lower level socket stuff is just C/C++. I don't want to speak on something I don't fully understand, so I included an article about the Dart VM below [2].

To me, Dart differentiated itself by being more similar to compiled, C-like languages. Obviously, Django, Laravel, Rails, etc. are much more mature. Aqueduct is tested well [3], but nothing beats years of regression tests.

1: https://www.dartlang.org/articles/language/beyond-async 2: https://www.dartlang.org/articles/dart-vm/why-not-bytecode 3: https://github.com/stablekernel/aqueduct