Under active development.
Wing is very young, naive, and currently under active development. This means that we still don't think it's a very useful tool at the moment, and definitely not ready for production use. Many of the APIs and language features will likely change in the coming months.
However, it's definitely ready for those brave of hearts who would like to be involved at this early stage, influence our roadmap and join us for the ride.
We are hard at work to get it to a state where it is ready to be used for real world projects (let's call it Beta). To that end, we need to cover sufficient surface area across the various components.
We manage our project roadmap through GitHub projects, which should offer an up-to-date view on what we've completed, what we are working on and our backlog.