For end users the api should be effectively versionless (i.e backwards compatible in all possible cases). Most api consumers don’t care if fields are added or

For end users the api should be effectively versionless (i.e backwards compatible in all possible cases). Most api consumers don’t care if fields are added or new methods added they are not using, thus they don’t care much about the version unless upgrading. Removing things or changing behaviour should be very rare and have a very good justification.