Your app isn't ready to support 'enterprise' until you can do both - you'll need to use this product + roll your own OIDC or find another service like this for OIDC. Customers will expect you to be agnostic and bring whichever they prefer.

SAML is the older protocol. It would be a design smell to see a new RP using it exclusively (people still implement SAML because enterprise customers have SAML IdPs).