Good thing there's other ways to implement SSE - be it in Go or many other servers and languages...

r3labs/sse seems pretty good, but doesn't seem to handle backpressure or defend against slow-client attacks. (actually, I haven't seen any libs that do.. maybe this isn't a problem for anyone?) You could roll your own, since the protocol is extremely simple.

That's a really small data point. I bet there're many projects using Go with SSE.