If these are new datatypes then they would break nothing (ignoring the "int" default part). > so what is it I am missing? The Go team has been adamant about a

If these are new datatypes then they would break nothing (ignoring the "int" default part). > so what is it I am missing? The Go team has been adamant about avoiding any changes that break existing code. The whole point of Go 2 is that at some point that might have to happen and they're trying to minimize that pain.