I've had a very positive experience with Keycloak and given its low barrier to deploy I don't really get why Auth as a service exists. I've seen more install/setup magic invoked just getting vscode configured. (slightly tongue in cheek).

Mind you, data residence and provenance may be more important in the use cases/applications I'm familiar with.

Then again, it is good to see a healthy standards based Authn/z ecosystem - good luck to all.

EDIT: After reviewing the site closer I'm not seeing anything about standards compliance.