It doesn't. SAML is a competing standard with the OpenID standards and is primarily only used for internal SSO within an organization. OIDC/OAuth2 have gotten b

It doesn't. SAML is a competing standard with the OpenID standards and is primarily only used for internal SSO within an organization. OIDC/OAuth2 have gotten broader adoption across the web. I suspect part of this has to with SAML using a more complex scheme and using XML, as opposed to OIDC/OAuth2 primarily being JSON based with very simple permission and identity models.