With Scala 3.9 LTS out, three Scala distributions will exist in parallel: Scala Next (3.10+), the current 3.9 LTS and the old 3.3 LTS. We will explain how to think about it: why you should migrate your libraries to 3.9 LTS, what cool features have we cooked up in Scala Next, and how the standard library can evolve now that it’s no longer frozen.