I really like Kotlin on the backend, it integrates nicely with Spring Boot, etc., but as soon as I say I have Kotlin experience, people say "Oh, so you're an android developer?"
I've never touched android development in my entire life.
Kotlin has its future assured thanks to godfather Google, stagnating Android Java on purpose (only recently they decided to finally move to Java 11 LTS subset), while promoting Koltin as its replacement for everything besides core platform.
I've never touched android development in my entire life.