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by mithaler 4939 days ago
The move to MTP was because Android now uses a virtual file system that unifies the SD card and internal storage, making it unsafe to allow a foreign OS to munge the content of the filesystem at the block level.

This is why it uses MTP for storage, as explained by Android engineer Dan Morrill: http://www.reddit.com/r/Android/comments/mg14z/whoa_whoa_ics...