[realtalk_sp]

I would challenge the idea that you must continuously learn. It's entirely possible to have become a Java/Spring specialist and continue to remain employed into 2020 and likely well beyond.

The churn you're alluding to happens mostly at the very thin frontier of innovation and applies largely to engineers who want to retain high compensation.

[maps7]

I'm looking at jobs in my area at the moment and being up to date doesn't really help in many ways. If I search for Rust or Elixir there are no jobs. If I search for gatsby or next there's no results (there are plenty for React though).

There are plenty of Java jobs though.