Status?
Just curious on the status of this, it seems like it stalled over a year ago...
It reached stage 4 and is part of ES2018.
The proposal has been merged into ECMA262 since https://github.com/tc39/ecma262/commit/b564aa94785aa5651342b02980380bf06ab44d59
See https://github.com/tc39/proposal-async-iteration#native-implementations for implementations.
@littledan I saw that, but didn't see an indication that it was in release, as a native implementation doesn't mean it's part of the spec.
@tracker1 The publication edition of a proposal can be found at https://github.com/tc39/proposals/blob/master/finished-proposals.md.