Feedback during review was fairly light, but was quite positive overall. The Group agrees with reviewers that this proposal provides a reasonable solution to important usability problems with AsyncSequence's under the current sendability rules.
Thank you to everyone who participated in the review!
Whether a particular feature is backported is not within the scope of evolution review nor the Language Steering Group's decision making authority and so the Group did not address that point when discussing this proposal. Someone from Apple with better knowledge of the deployment plans (and ability to discuss them) would have to comment here to answer that question.