My comment was a little flip, I know, I should have asked a more friendly question. I'm wondering why it hasn't been discussed (as far as I can tell). Java has had it for ages, Ruby will have it in 2.1 and Python appears to have it as well [1]. Isn't Generational GC feasible in Go for some reason?
Edit: Here is a discussion of gc in go. Go has only just gotten a precise collector, which is a requirement of a generational gc, to allow moving pointers.
I've heard talk of plans for a generational, moving GC in future. It's just not something that can be implemented overnight, especially in a language with internal pointers (which Java, Ruby and Python lack).
[1] https://docs.python.org/2/library/gc.html
Edit: Here is a discussion of gc in go. Go has only just gotten a precise collector, which is a requirement of a generational gc, to allow moving pointers.
https://groups.google.com/forum/#!topic/golang-nuts/fiOs3mGH...