As far as I can tell, the only reason for a Go 2 (as opposed to a Go 1.nnnn) is "we introduced a breaking change". Things that were considered "Go 2" are being

As far as I can tell, the only reason for a Go 2 (as opposed to a Go 1.nnnn) is "we introduced a breaking change". Things that were considered "Go 2" are being worked in, as the language evolves, without the need to break previously written code.