It doesn't matter if libraries rely on macros because 1) you only depend on their compiled output and 2) you can use Scala 2.13 code from Scala 3. That said, th

It doesn't matter if libraries rely on macros because 1) you only depend on their compiled output and 2) you can use Scala 2.13 code from Scala 3. That said, the vast majority of the open source ecosystem has Scala 3 releases by now.