I haven't heard of this either. I guess they just wanted something that worked with minimal effort. Making the plugin and writing/coming up with spec tests take

I haven't heard of this either. I guess they just wanted something that worked with minimal effort. Making the plugin and writing/coming up with spec tests takes time but albeit a better effort for the community overall. Maybe we can get more contributors for this effort now? I made an issue for parser support, and after that we can create a babel plugin though https://github.com/babel/babylon/issues/328 https://github.com/babel/babylon/issues/328.