When we started C1.ai - 2020 - as someone who worked previously at Okta - I made a decision to only implement OIDC. (see article for all of the reasons). We were worried in the first 2 years, that some big enterprise would force us to implement SAML.
But it turns out, all the major IDPs support OIDC now. It's a non-issue.
But it turns out, all the major IDPs support OIDC now. It's a non-issue.