I can see you're a Go fan but I think .NETcore has potential to start eating away at Java in a big way if Microsoft continues on its current path. They can actually provide the enterprise level support big corps want.
.NET's developer community is in no place comparable Golang's or Javascript's. Just take a look at GitHub's trending page by programming languages. Javascript is really bad for server side applications, and yet here we are with so many nodejs server apps. It doesn't matter much how good a tech is. What matters more is what the new generation is using, which you can get a sense from the trending page on GitHub.