Hi Tressie. This update has been activated for me. Your concerns, whilst valid, are unfounded. Replies are still regulated to the accounts you’re responding to (I checked the stats to ensure this was the case) and when replying, you can click on who you’re replying to and untick accounts you don’t want to be included in the tweet; so you still have “selective visibility”. Basically, you have the same features, but Twitter has provided them in a cleaner way whilst increasing your character count.