The book is basically done for now. I will likely update it for Scala 3, but that's still a moving target, so I'll wait for the dust to settle before considering it.
I don't expect the code to need to change too much to support Scala 3: Scala 3 is likely going to be backwards compatible to a large degree, and the code you'll be writing in Hands-on Scala is pretty simple Scala that doesn't touch the more advanced features that might be affected by the upgrade
I don't expect the code to need to change too much to support Scala 3: Scala 3 is likely going to be backwards compatible to a large degree, and the code you'll be writing in Hands-on Scala is pretty simple Scala that doesn't touch the more advanced features that might be affected by the upgrade