Twitter Blue only. In the announcement, Twitter says, “while only Blue subscribers can post longer Tweets, anyone and everyone can read them. you can reply to, retweet, and quote Tweet a longer Tweet, no matter if you’re a Twitter Blue subscriber or not. subscribers will be able to reply and QT with up to 4,000 characters.”

Why we care. If you’re a Twitter Blue subscriber, this is good news for you. But if you hate long Tweets and threads, you might want to reexamine your following list.