Standalone vaults in 1Password 8

Hello
The standalone vault feature that everyone here want is actually still in IOS version of 1password, if I'm correct.
I wonder why it is not supported on other devices.
I'm very happy with 1password.com subscription service, but I think it would be good if you could give users an option to create and manage there own standalone vaults which doesn't automatically sync with 1password server and can be exported in an encrypted form, from the device that has access to that standalone vault, so users can carry it like a file.
Personally I think it is possible since we have standalone vault feature on IPhone, but the situation might be different.
Please let me know if that is the case.
Thanks.
P.S I'm using 1password for IPhone version 7.9.5, which seems to be the latest version.