[user5994461]

If you want JWT tokens, you should be using OpenID Connect instead of SAML. There is very little reasons to use SAML in 2020, it's over complicated and has little support. OpenID Connect does 95% of the same, much better.

If you want self hosted IAM solutions. The most common one is Microsoft active directory. It provides both SAML and OpenID Connect integrations out of the box as of ADFS 2016.

Still, SAML requires to onboard applications individually, create keys, and stuff. It's not plug and play, it really needs humans on both sides to add a new service.

[Saaster]

Unfortunately the demand for SAML is 100% customer driven. As service providers, we don't control the other end (the customer's IdP/AD).

Even in cases where the IdP supports both SAML & OIDC, I see almost no one choosing to use OIDC (a case of the devil you know?). The only real users of OIDC in an enterprise setting I see as a service provider, is G Suite businesses.

[user5994461]

I think this is mostly driven by history. OIDC came in few years after SAML, so people are still thinking of SAML first and asking for it for enterprise integrations.

I'm pretty sure OIDC can be supported everywhere now. Okta, Oauth, PingIdentity, ForgeRock, Microsoft all support both. The last offender was Microsoft but it's included with active directory since 2016 both on premise or through Azure.

I'm working on auth for a big bank and it's definitely there, although not necessarily advertised and not everybody understand what is supported or preferred.

If a company were to only support OIDC nowadays, and maintain that OIDC is the preferred protocol when customers ask "can you do SAML?", I am willing to bet that most customers would integrate just fine either way.