&gt; iMessage does all of the stuff whatsapp does regarding groups<p>Well, it can.  But it can also be a nightmare.  I&#x27;ve had a long running group chat with 2 other people (so only 3 people!) and it frequently fucks up—one person no longer getting texts on certain devices.  Random copies of our group being formed and reformed.  Receiving texts in one version of the group, and when sending them, they show up in another.  The group name is common, so occasionally it gets renamed.  Our avatar images getting replaced by random images (I think this is a bug in the iPhone address book rather than iMessages, but it still annoys me in iMessages).  And so on.  Most of the time it works nicely, but once every few months it&#x27;s a real pain for a few days.