No, not really. There might be a few changes, but probably nothing which can't be fixed automatically by a tool/IDE. (They are investing in that currently.) A

No, not really. There might be a few changes, but probably nothing which can't be fixed automatically by a tool/IDE. (They are investing in that currently.) Additionally, if your code compiles with version X without warnings, it should compile with version X+1, too. (Otherwise that would be a bug.) Apart from that, stable versions are supported for a long time, so just like in Java you can migrate when you feel comfortable with it.