I disagree on JS libraries having a lack of support... I'd say that most current libraries have Promise support (which works for async/await). You even have async generator support, which is pretty damned cool for an alternate I/O interface that's imho cleaner to work with.

Other than that, I do agree, I really like C# a lot and am glad the effort that's been put into making sure Core works cross platform. I still shutter every time I have to work in VS (not Code) though.