I'd call Spark a much more bleeding edge product than Consul. And no, it's not the hot new thing at all. It's just a standard tool.

And the funny part is that all of them are Java. :) Well, except Spark which is Scala.

Yes, exactly. In a list of most important tools out there, Go only turns up for a few tasks that used to be done in C++, as layer between the OS and services.

Almost everywhere else, it’s not "industry-dominating" at all, so I’m not sure why people use the argument "go is used everywhere and everything is in go" (which is obviously false) to argue that go is a good language.

(besides, C is actually used everywhere, but no one would use that as argument to show how C is a good language).