Not go developer, just curious about the language and ecosystem and really like it. For me would be nice to have more functional features. For example - explicitly say that a variable is mutable / immutable, preferably have immutability by default. Also native support for map/filter/reduce/etc. Those are good abstraction and it is easier to read than `for loops`, since you don't need to look over shoulders all the time. Guess latest would be easier to add since there is support for generics already.
Native support for them in the context of the existing Go spec will be coming with the next release. To reserve the right to evolve the native support before committing it to the backwards compatibility promise, it will initially appear in the https://pkg.go.dev/golang.org/x/exp external repository, but that is the official Go repo for things either too unstable to be included in the standard library, or still experimental. General expectation is it'll be in the standard library in the release after that. It won't be in the standard library, but it's as official as it can be beyond that.
I carefully phrased that with "in the context of the existing Go spec", because I think expectations of this support are wildly out of whack with the reality. It's still going to be a very unpleasant style to work in, with many and manifold problems: http://www.jerf.org/iri/post/2955 . I think people will be crazy to turn to that style in Go. Go wasn't just missing generics to support this style, it was missing many things, and "solving" the generics problem still leaves it missing many things.
