There’s this as well: SCIM as an alternative to Directory Connector for user management - Feature Requests - Bitwarden Community Forums
It should be more efficient as it’s push based directly from the IdP, as opposed to being pull-based from the SP, more info: Azure Active Directory Sync Efficiency considerations · Issue #83 · bitwarden/directory-connector (github.com)
Generally, open standards are preferred and encouraged, like SCIM, as opposed to using vendor specific APIs.