A lot of my friends in SF tend to pick up a new language every year or two. Is this type comparatively rare in Berlin or are people just digging into a long list of other languages first?
For example, I picked up Elixir (which I currently make money using) by rewriting a Rails app into Phoenix four years ago. That app never made me any money, but it did provide a great motivation for learning Elixir!
Similarly, I'm learning Rust now. I'm going through books and videos, building toy projects and slowly picking it up. I've never been paid to write Rust, but that will likely change in the future.
Other languages, like Racket and 8088 assembly I've never been paid to write and likely never will but I don't regret exploring them a bit.