Roaming, ID Vault and SSO, can't I have it all?

In the process of rolling out the 8.5.1FP1 client with Roaming and SSO enabled. However we really want to start using the ID Vault. I can’t believe the ID Vault does not support Roaming and SSO! ID Vault works with Shared login, but you can’t Roam with Shared Login.

Is this a bad joke???

Subject: You can’t roam the ID file, but you should be able to roam everything else (with the new file system roaming) <>