Loss of strong typing and runtime type detection is what makes me sad.
Well, Go 1 has some of the problems of Java 1: no generics, typecasts from interface{} here and there, simplistic GC.
Reasons are probably similar: this all is good enough for version 1, and can later be improved upon.
"Well, Go 1 has some of the problems of Java 1: no generics, typecasts from interface{} here and there, simplistic GC. Reasons are probably similar: this all is good enough for version 1, and can later be improved upon."
Except I doubt we're going to see generics in Go version 2, whenever that may be. The sentiment against it has been pretty strong in the golang-nuts mailing list.
http://talks.golang.org/2013/bestpractices.slide#6