Vault Store DB limitations on archived items

Hi All

I believe in the performance guide for EV 7.5 there was mention of a suggested limitation of 100 million items per vault store db.

Does this still apply for later EV versions?

Is there any symantec best practises around this and how you would deal with a mailbox vault store? I.e. with journaling you can just create a new vault store & archive but its not that easy with user archives.

thanks