"All data stored on Hive blockchain is immutable. " That's true, but that feature is the best, but also the worst if something illegal is posted. This is one aspect that needs improvement. The world won't accept it. Luckily, it should be possible to do something about it in a PoS blockchain. I wonder if Hive has done something about it because I don't see any bad content on Hive. Which is great news.