There are actually authentication providers that will pretend to be LDAP server for your apps, regardless of what auth backend you use. But yeah, once your cli

There are actually authentication providers that will pretend to be LDAP server for your apps, regardless of what auth backend you use. But yeah, once your clients are big corporations you'd at least need to know how to implement some kind of cloud mess of authentication provider(s), still, doesn't need you need to infect your own stack with it.