Nobody wants to write or maintain SAML code -> SaaS and other types of companies start solving this issue at scale -> SAML becomes code that is mostly going

Nobody wants to write or maintain SAML code -> SaaS and other types of companies start solving this issue at scale -> SAML becomes code that is mostly going through a handful of large companies that sell products in this space -> since the protocol is now centralized, it can be updated to a better protocol