In fact, it’s hard to see where a Level 4 language perfectly fits. After you’ve surpassed the abilities of JSON or YAML (and you don’t opt for slapping on a templating engine like Helm does), it feels like jumping straight to Level 5 is worth the effort for the tooling and larger community.
I still have yet to hear any non-technical person I know encounter issues on Windows and seriously consider switching away. The learned helplessness instilled by Microsoft is very difficult to get people to shake off.