Discussion here: https://news.ycombinator.com/item?id=21473259
That said, only one or the other should probably be on HN; it's a tough call as to which. This post is more general, but people are going to care about async/await more than anything else...
Right now the other post is enjoying more attention and has meaningful engaging discussion. Requesting @dang to remove this (21473257) from front page and possibly tag the other one (21473259) with 1.39.0 release.