Managed Metadata Service Architecture improvements

I am reading article on managed metadata service application

http://www.andrewconnell.com/sharepoint-2010-managed-metadata-in-depth-look-into-the-taxonomy-parts

Its very very good. but I wonder what changes have occurred in sp2013.

are there more timer jobs, hidden lists, or functionality in sp2013?

How exactly does the 2013 SA work? what are the internal components

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