The funny thing is that from a purely technological point of view, Java (even the 5-year-old Java 8 and certainly recent versions) is far ahead of most other stuff hyped on HN (as well as less hyped stuff).
The technology is certainly impressive but it isn't equipped to deal with the modern world. It is trivial to run 10 Node.js applications in the memory of one JVM application. This never used to be a problem, but now the cloud is forcing apps to pay for the resources they use its a kiss of death.
There is also the move to serverless and the slow start of the JVM which makes it literally the worst choice out of all the alternatives.
Oh, and lets not even start on the train wreck of Oracle's stewardship -- Java 11 is competing with Java 8.
Java will survive but I cannot see it having any place in a modern software stack.