Any word on whether replies will be limited to one, or if you could have very long threads of messages going back and forth between a user and the developer? A

Any word on whether replies will be limited to one, or if you could have very long threads of messages going back and forth between a user and the developer? Also, curious if developers will be able to respond to old reviews written before this was the policy. I'm thinking so. Been hoping for this ever since the App Store was released, especially after being able to do it on the Google Play store for some time.