Love "Brittleness of Replication"
With Cassandra, peer to peer replication is a big selling point. And Hadoop has distributing computing. MSSS has had peer to peer replication for quite a long time, but has it advanced?
If they had invested on making peer to peer in sql server solid, it would give it a multi-site HA, DR and scale-out strategy position. No, they follow the cluster approach, and even deprecate mirroring. We can only guess what it would have been.
The more you are prepared, the less you need it.