Highly useful to be able to have access groups like "team" (everyone, things like Zendesk) "team-secure" (stuff with CC's, like Amazon), "dev" (general dev accounts), and "dev-secure" (compose.io access and the like).
Makes it way faster to onboard new folks, and when people leave, to cleanly strip access and change passwords.
The open source tools don't solve for those kinds of use cases, as far as I know. Just "I have one computer, and want to store my passwords on that one computer."