No, Kotlin moves in opposite direction
Allowing adding new syntax with plugins has two very big concerns:
1. It may turn Kotlin into numerous of local dialects, which will greatly increase complexity for new users
2. It's extremely hard to support such plugins in tooling (IDE, linters, etc)
So we are trying to provide such compiler API, which allows users to create really cool things with compiler from one side, and keep the language solid from the other