SharePoint 2010 already had 3 different cache mechanisms (page output cache, object cache, blog cache).
SharePoint 2013 had the distributed AppFabric cache. And I know it also still has the disk-based blob cache (which is apparently required for the image renditions feature).
Can anybody shed any light on the relationship betwen the new cache and the old cache mechanisms? Are the page output and object cache still there? Do SQL blobs get cached in the AppFabic cache at all? Etc.