SQL AlwaysOn & System Center Configuration Manager TP 4 1601
Availability Groups have rapidly become Microsoft's key HA strategy. They are slightly easier to setup and maintain than SQL Server Failover Clustering but provide slightly different benefits and drawbacks. FCIs are purely for SQL Instance level HA solutions whereas Availability Groups provide HA at the Availability Group (group of databases) level.

They are not without their faults or restrictions but their simplicity, flexibility and integration with Azure make them compelling to use for SQL Server, SharePoint and Systems Center HA (where supported).