Support hierarchical facets
Searching in a hierarchy is very common.
In the meantime, please see this page for details on how to do this: http://blogs.technet.com/b/onsearch/archive/2015/09/09/multi-level-taxonomy-facets-in-azure-search.aspx
Any updates on this? I tried a very similar approach to the one outlined in the blogpost that you provided and the performance degradation becomes tremendous when you have a scenario like year/make/model/partType of thousands of auto parts.
And since there is no top level category that we can use (like in the bikes--> mountain bike) scenario of the blog we really don't have good ways to address this (except for using a separate solution for facets like a Redis data store)