Yeah, meanwhile Gonuts will still be discussing what is the best way to add generics, while it's users on Hacker News keep telling us that it isn't political and there is a working prototype at Google.

So where is the EA for generics like the value types EA I can download today from OpenJDK repository?

To be fair, apparently this appears to be the current internal prototype, https://go-review.googlesource.com/c/go/+/187317

It still appears quite far from being done in 2021, though.