> To put it simply, it’s the enterprise equivalent of the “Login with Google” or “Login with Facebook” buttons we see in apps around the internet.

This is a little pedantic since the original article is from 2020 when using SAML might have still been worthwhile to invest time into... But today OpenID Connect (OIDC) is the Enterprise equivalent of these features, or rather these products from major vendors are each just their implementations of OpenID Connect. If you have the choice, you should probably be looking at OIDC instead of SAML for federated identity today.