Sure, but that would arise because you've followed the advice in the article.
If you're a relying party, and you want to integrate with Okta, Google, other OIDC-supporting IdPs … implement OIDC!
If you're on the RP side and you have to integrate with an IdP that only speaks SAML and not OIDC, well, then you're probably out of luck and just have to make the call: is it worth the business? Maybe it is. Then you implement SAML.
If you're a relying party, and you want to integrate with Okta, Google, other OIDC-supporting IdPs … implement OIDC!
If you're on the RP side and you have to integrate with an IdP that only speaks SAML and not OIDC, well, then you're probably out of luck and just have to make the call: is it worth the business? Maybe it is. Then you implement SAML.