This. Kotlin is a great language with a lot of potential, but JB keeps locking it away in their own ecosystem. I used to do stuff with it before but this attitude has driven me away.
How have they "locked" it in? That's just BS, you are completely free to write your own tooling. The fact they're not making plugins for the language for competing products is in no way "locking it away".
The Jetbrains ecosystem is well integrated. Kotlin is a dish best served with IDEA. There are people who do not like using it.