Ory is the largest open source community in the world for cloud software application security. We maintain advanced open source security software solving authentication, authorization, access control, application network security, and delegation. Ory implements a variety of industry and best-practice standards including OAuth 2.0 / OAuth 2.1, OpenID Connect, Zero Trust Networking, Google Zanzibar Policy Framework, FIDO2 U2F, WebAuthn, TOTP, and more.

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Can I ask why the SDKs for those using self-hosted Ory need to be separate from the Ory.Client at all, with just some sort of switch to turn off API key/Network auth?

Hey <@U08TYK9JCKA> valid question,
the main reason is that Ory Network releases faster than the OSS release, so there could be issues with a version missmatch.
Most of the time it is fine but it is better to use the dedicated SDK then its sure to be the right version.

Ahh, I see - so it's more to do with not polluting the API surface with methods that don't (yet) exist in OSS land